errors loading additional url in board manager

[dalemcbeath]

Describe the bug
re: issue 61 found searching for info on how to add ESP32 board to Pro IDE, added URL as shown, which produces errors.

To Reproduce

board_manager:
  additional_urls: [https://dl.espressif.com/dl/package_esp32_index.jsonc]

Expected behavior
expected board I am using in regular IDE to work in Pro version

Desktop (please complete the following information):
Mac 10.15.6

Additional context
board is an Espresiff ESP32-WROVER-B, ,working fine from normal IDE

ERRORS

[INFO] Checking signature [index: /Users/CritterLab/Library/Arduino15/package_index.json, signaturefile: /Users/CritterLab/Library/Arduino15/package_index.json.sig, trusted: true]
[INFO] Checking if CLI is Bundled into the IDE
[INFO] Loading hardware from: /Users/CritterLab/Library/Arduino15/packages
[INFO] Loading package Heltec-esp32 from: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/hardware
[INFO] Loaded platform [platform: {ID:"Heltec-esp32:esp32",Installed:"0.0.5",Latest:"0.0.5"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/tools
[INFO] Loaded tool [tool: Version: 2.6.1]
[INFO] Loaded tool [tool: Version: 0.2.3]
[INFO] Loaded tool [tool: Version: 1.22.0-80-g6c4433a-5.2.0]
[INFO] Loading package arduino from: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware
[INFO] Loaded platform [platform: {ID:"arduino:avr",Installed:"1.8.3",Latest:"1.8.3",Name:"Arduino AVR Boards"}]
[INFO] Loaded platform [platform: {ID:"arduino:mbed",Installed:"1.1.4",Latest:"1.1.6",Name:"Arduino nRF528x Boards (Mbed OS)"}]
[INFO] Loaded platform [platform: {ID:"arduino:megaavr",Installed:"1.8.6",Latest:"1.8.6",Name:"Arduino megaAVR Boards"}]
[INFO] Loaded platform [platform: {ID:"arduino:sam",Installed:"1.6.12",Latest:"1.6.12",Name:"Arduino SAM Boards (32-bits ARM Cortex-M3)"}]
[INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.6",Latest:"1.8.8",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
[INFO] Loaded platform [platform: {ID:"arduino:samd_beta",Installed:"1.6.25",Latest:"1.6.25",Name:"Arduino SAMD Beta Boards (32-bits ARM Cortex-M0+)"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/arduino/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/arduino/tools
[INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
[INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
[INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 1.3.0 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 4.8.3-2014q1 Systems: [OS: arm-linux-gnueabihf, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 7.3.0-atmel3.6.1-arduino5 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: x86_64-apple-darwin14, OS: i686-mingw32, OS: i686-linux-gnu, OS: x86_64-linux-gnu]]
[INFO] {"level":"info","msg":"Loaded tool","time":"2020-09-11T15:29:48-10:00","tool":{"version":"7.3.0-atmel3.6.1-arduino7","systems":[{"os":"arm-linux-gnueabihf","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-arm-linux-gnueabihf.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-arm-linux-gnueabihf.tar.bz2","Checksum":"SHA-256:3903553d035da59e33cff9941b857c3cb379cb0638105dfdf69c97f0acc8e7b5","Size":34683056,"CachePath":"packages"}},{"os":"aarch64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-aarch64-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-aarch64-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:03d322b9df6da17289e9e7c6233c34a8535d9c645c19efc772ba19e56914f339","Size":38045723,"CachePath":"packages"}},{"os":"x86_64-apple-darwin14","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-apple-darwin14.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-apple-darwin14.tar.bz2","Checksum":"SHA-256:f6ed2346953fcf88df223469088633eb86de997fa27ece117fd1ef170d69c1f8","Size":36684546,"CachePath":"packages"}},{"os":"i686-mingw32","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-w64-mingw32.zip","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-w64-mingw32.zip","Checksum":"SHA-256:a54f64755fff4cb792a1495e5defdd789902a2a3503982e81b898299cf39800e","Size":52519412,"CachePath":"packages"}},{"os":"i686-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:954bbffb33545bcdcd473af993da2980bf32e8461ff55a18e0eebc7b2ef69a4c","Size":37176991,"CachePath":"packages"}},{"os":"x86_64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:bd8c37f6952a2130ac9ee32c53f6a660feb79bee8353c8e289eb60fdcefed91e","Size":37630618,"CachePath":"pack
[INFO] ages"}}]}}
[INFO] Loaded tool [tool: Version: 6.3.0-arduino17 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: x86_64-apple-darwin12, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 1.6.1-arduino Systems: [OS: arm-linux-gnueabihf, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 1.9.1-arduino1 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 0.9.0-arduino2 Systems: [OS: i386-apple-darwin11, OS: arm-linux-gnueabihf, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 0.10.0-arduino13 Systems: [OS: aarch64-linux-gnu, OS: arm-linux-gnueabihf, OS: i686-linux-gnu, OS: i686-mingw32, OS: i386-apple-darwin11, OS: x86_64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] {"level":"info","msg":"Loaded tool","time":"2020-09-11T15:29:48-10:00","tool":{"version":"0.10.0-arduino9","systems":[{"os":"aarch64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-aarch64-linux-gnu.tar.bz2","ArchiveFileName":"openocd-0.10.0-arduino9-static-aarch64-linux-gnu.tar.bz2","Checksum":"SHA-256:b814b16b52cef21eacf456cc7a89d7b5d4cb1385bfb8fb82963b7d8151824d93","Size":1714657,"CachePath":"packages"}},{"os":"arm-linux-gnueabihf","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-arm-linux-gnueabihf.tar.bz2","ArchiveFileName":"openocd-0.10.0-arduino9-static-arm-linux-gnueabihf.tar.bz2","Checksum":"SHA-256:f0443e771f5e3a779949498d3c9bfffd1dd27cdf0ad7136a2db5e80447a7175a","Size":1778177,"CachePath":"packages"}},{"os":"i686-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-i686-ubuntu12.04-linux-gnu.tar.bz2","ArchiveFileName":"openocd-0.10.0-arduino9-static-i686-ubuntu12.04-linux-gnu.tar.bz2","Checksum":"SHA-256:a22872918df899cb808f9286141d42438ae5611156c143cfb692069f52a2bddd","Size":1782958,"CachePath":"packages"}},{"os":"i686-mingw32","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-i686-w64-mingw32.zip","ArchiveFileName":"openocd-0.10.0-arduino9-static-i686-w64-mingw32.zip","Checksum":"SHA-256:f53f9a2b7f48a2ebc00ea9196bf559d15987d3779bcea4118ebec8925da5a1f6","Size":2190484,"CachePath":"packages"}},{"os":"i386-apple-darwin11","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-x86_64-apple-darwin13.tar.bz2","ArchiveFileName":"openocd-0.10.0-arduino9-static-x86_64-apple-darwin13.tar.bz2","Checksum":"SHA-256:6d47f97919f317bb6e5f1f903127604271d66d149f4625f29b8e0eb5f6c94c64","Size":1655311,"CachePath":"packages"}},{"os":"x86_64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/openocd-0.10.0-arduino9-static-x86_64-ubuntu12.04-linux-gnu.tar.bz2","ArchiveFileName":"openocd-0.10.0-arduino9-static-x86_64-ubuntu12.04-linux-gnu.tar.bz2","Checksum":"SHA-256:f624552b5ba56aa78d0c1a0e5d18cf2b5694db2ed44080968e22aa1af8f23c1b","Size":
[INFO] 1844365,"CachePath":"packages"}}]}}
[INFO] Loading package arduino-beta from: /Users/CritterLab/Library/Arduino15/packages/arduino-beta/hardware
[INFO] Loaded platform [platform: {ID:"arduino-beta:mbed",Installed:"1.2.2",Latest:"1.2.2",Name:"Arduino mbed-enabled Boards"}]
[INFO] Loading package atmel-avr-xminis from: /Users/CritterLab/Library/Arduino15/packages/atmel-avr-xminis/hardware
[INFO] Loaded platform [platform: {ID:"atmel-avr-xminis:avr",Installed:"0.6.0",Latest:"0.6.0",Name:"Atmel AVR Xplained-minis"}]
[INFO] Loading package builtin from: /Users/CritterLab/Library/Arduino15/packages/builtin
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/builtin/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/builtin/tools
[INFO] Loaded tool [tool: Version: 5.8-arduino11]
[INFO] Loaded tool [tool: Version: 1.0.0]
[INFO] Loading package emoro from: /Users/CritterLab/Library/Arduino15/packages/emoro/hardware
[INFO] Loaded platform [platform: {ID:"emoro:avr",Installed:"3.2.2",Latest:"3.2.2",Name:"EMORO 2560"}]
[INFO] Loading package esp32 from: /Users/CritterLab/Library/Arduino15/packages/esp32/hardware
[INFO] Loaded platform [platform: {ID:"esp32:esp32",Installed:"1.0.4",Latest:"1.0.4"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/esp32/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/esp32/tools
[INFO] Loaded tool [tool: Version: 2.6.1]
[INFO] Loaded tool [tool: Version: 0.2.3]
[INFO] Loaded tool [tool: Version: 1.22.0-80-g6c4433a-5.2.0]
[INFO] Loading package esp8266 from: /Users/CritterLab/Library/Arduino15/packages/esp8266/hardware
[INFO] Loaded platform [platform: {ID:"esp8266:esp8266",Installed:"2.7.1",Latest:"2.7.1"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/esp8266/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/esp8266/tools
[INFO] Loaded tool [tool: Version: 2.5.0-4-fe5bb56]
[INFO] Loaded tool [tool: Version: 2.5.0-4-b40a506]
[INFO] Loaded tool [tool: Version: 3.7.2-post1]
[INFO] Loaded tool [tool: Version: 2.5.0-4-b40a506]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Documents/Arduino/libraries, location: user]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/esp8266/hardware/esp8266/2.7.1/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/esp32/hardware/esp32/1.0.4/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/atmel-avr-xminis/hardware/avr/0.6.0/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/emoro/hardware/avr/3.2.2/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/hardware/esp32/0.0.5/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino-beta/hardware/mbed/1.2.2/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.6/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/sam/1.6.12/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/samd/1.8.6/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/samd_beta/1.6.25/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/mbed/1.1.4/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/avr/1.8.3/libraries, location: platform]
[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/776529606.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/776529606, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/776529606.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.

**Error while updating index in attempt 0: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/283420199.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/283420199, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/283420199.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 1: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/758862748.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/758862748, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/758862748.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 2: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/685131957.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/685131957, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/685131957.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 3: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/435191362.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/435191362, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/435191362.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Error while updating index in attempt 4: Error: 2 UNKNOWN: downloading index https://dl.espressif.com/dl/package_esp32_index.jsonc: Get https://dl.espressif.com/dl/package_esp32_index.jsonc: dial tcp 119.9.91.16:443: connect: operation timed out[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/854342995.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/854342995, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/854342995.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 5: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/079539768.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/079539768, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/079539768.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 6: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/240801153.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/240801153, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/240801153.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Error while updating index in attempt 7: Error: 2 UNKNOWN: downloading index https://dl.espressif.com/dl/package_esp32_index.jsonc: Get https://dl.espressif.com/dl/package_esp32_index.jsonc: dial tcp 119.9.91.16:443: connect: operation timed out[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/608617214.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/608617214, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/608617214.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 8: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating index [url: https://downloads.arduino.cc/packages/package_index.json]
Updating index: package_index.json completed.
Updating index: package_index.json.sig completed.
[INFO] Checking signature [error: opening signature file: open /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/633991359.sig: no such file or directory, index: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/633991359, signaturefile: /var/folders/5p/4l0zgkyd2zv3lf7nfj2xq41r0000gq/T/633991359.sig]
[INFO] Updating index [url: https://dl.espressif.com/dl/package_esp32_index.jsonc]
Updating index: package_esp32_index.jsonc completed.
Error while updating index in attempt 9: Error: 2 UNKNOWN: invalid package index in https://dl.espressif.com/dl/package_esp32_index.jsonc: invalid character '<' looking for beginning of value[INFO] Updating libraries index
Updating index: library_index.json completed.
[INFO] Checking signature [index: /Users/CritterLab/Library/Arduino15/package_index.json, signaturefile: /Users/CritterLab/Library/Arduino15/package_index.json.sig, trusted: true]
[INFO] Loading hardware from: /Users/CritterLab/Library/Arduino15/packages
[INFO] Loading package Heltec-esp32 from: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/hardware
[INFO] Loaded platform [platform: {ID:"Heltec-esp32:esp32",Installed:"0.0.5",Latest:"0.0.5"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/tools
[INFO] Loaded tool [tool: Version: 2.6.1]
[INFO] Loaded tool [tool: Version: 0.2.3]
[INFO] Loaded tool [tool: Version: 1.22.0-80-g6c4433a-5.2.0]
[INFO] Loading package arduino from: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware
[INFO] Loaded platform [platform: {ID:"arduino:avr",Installed:"1.8.3",Latest:"1.8.3",Name:"Arduino AVR Boards"}]
[INFO] Loaded platform [platform: {ID:"arduino:mbed",Installed:"1.1.4",Latest:"1.1.6",Name:"Arduino nRF528x Boards (Mbed OS)"}]
[INFO] Loaded platform [platform: {ID:"arduino:megaavr",Installed:"1.8.6",Latest:"1.8.6",Name:"Arduino megaAVR Boards"}]
[INFO] Loaded platform [platform: {ID:"arduino:sam",Installed:"1.6.12",Latest:"1.6.12",Name:"Arduino SAM Boards (32-bits ARM Cortex-M3)"}]
[INFO] Loaded platform [platform: {ID:"arduino:samd",Installed:"1.8.6",Latest:"1.8.8",Name:"Arduino SAMD Boards (32-bits ARM Cortex-M0+)"}]
[INFO] Loaded platform [platform: {ID:"arduino:samd_beta",Installed:"1.6.25",Latest:"1.6.25",Name:"Arduino SAMD Beta Boards (32-bits ARM Cortex-M0+)"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/arduino/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/arduino/tools
[INFO] Loaded tool [tool: Version: 4.5.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
[INFO] Loaded tool [tool: Version: 1.2.0 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: all]]
[INFO] Loaded tool [tool: Version: 1.2.1 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 1.3.0 Systems: [OS: i686-linux-gnu, OS: x86_64-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 4.8.3-2014q1 Systems: [OS: arm-linux-gnueabihf, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 7-2017q4 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 7.3.0-atmel3.6.1-arduino5 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: x86_64-apple-darwin14, OS: i686-mingw32, OS: i686-linux-gnu, OS: x86_64-linux-gnu]]
[INFO] {"level":"info","msg":"Loaded tool","time":"2020-09-11T15:33:34-10:00","tool":{"version":"7.3.0-atmel3.6.1-arduino7","systems":[{"os":"arm-linux-gnueabihf","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-arm-linux-gnueabihf.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-arm-linux-gnueabihf.tar.bz2","Checksum":"SHA-256:3903553d035da59e33cff9941b857c3cb379cb0638105dfdf69c97f0acc8e7b5","Size":34683056,"CachePath":"packages"}},{"os":"aarch64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-aarch64-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-aarch64-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:03d322b9df6da17289e9e7c6233c34a8535d9c645c19efc772ba19e56914f339","Size":38045723,"CachePath":"packages"}},{"os":"x86_64-apple-darwin14","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-apple-darwin14.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-apple-darwin14.tar.bz2","Checksum":"SHA-256:f6ed2346953fcf88df223469088633eb86de997fa27ece117fd1ef170d69c1f8","Size":36684546,"CachePath":"packages"}},{"os":"i686-mingw32","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-w64-mingw32.zip","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-w64-mingw32.zip","Checksum":"SHA-256:a54f64755fff4cb792a1495e5defdd789902a2a3503982e81b898299cf39800e","Size":52519412,"CachePath":"packages"}},{"os":"i686-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-i686-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:954bbffb33545bcdcd473af993da2980bf32e8461ff55a18e0eebc7b2ef69a4c","Size":37176991,"CachePath":"packages"}},{"os":"x86_64-linux-gnu","Resource":{"URL":"http://downloads.arduino.cc/tools/avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-pc-linux-gnu.tar.bz2","ArchiveFileName":"avr-gcc-7.3.0-atmel3.6.1-arduino7-x86_64-pc-linux-gnu.tar.bz2","Checksum":"SHA-256:bd8c37f6952a2130ac9ee32c53f6a660feb79bee8353c8e289eb60fdcefed91e","Size":37630618,"CachePath":"pack
[INFO] ages"}}]}}
[INFO] Loaded tool [tool: Version: 6.3.0-arduino17 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: x86_64-apple-darwin12, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 1.6.1-arduino Systems: [OS: arm-linux-gnueabihf, OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu]]
[INFO] Loaded tool [tool: Version: 1.7.0-arduino3 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 1.9.1-arduino1 Systems: [OS: i686-mingw32, OS: x86_64-apple-darwin, OS: x86_64-pc-linux-gnu, OS: i686-pc-linux-gnu, OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 0.9.0-arduino2 Systems: [OS: i386-apple-darwin11, OS: arm-linux-gnueabihf, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 0.10.0-arduino13 Systems: [OS: aarch64-linux-gnu, OS: arm-linux-gnueabihf, OS: i686-linux-gnu, OS: i686-mingw32, OS: i386-apple-darwin11, OS: x86_64-linux-gnu]]
[INFO] Loaded tool [tool: Version: 0.10.0-arduino7 Systems: [OS: arm-linux-gnueabihf, OS: aarch64-linux-gnu, OS: i386-apple-darwin11, OS: x86_64-linux-gnu, OS: i686-linux-gnu, OS: i686-mingw32]]
[INFO] Loaded tool [tool: Version: 0.10.0-arduino9 Systems: [OS: aarch64-linux-gnu, OS: arm-linux-gnueabihf, OS: i686-linux-gnu, OS: i686-mingw32, OS: i386-apple-darwin11, OS: x86_64-linux-gnu]]
[INFO] Loading package arduino-beta from: /Users/CritterLab/Library/Arduino15/packages/arduino-beta/hardware
[INFO] Loaded platform [platform: {ID:"arduino-beta:mbed",Installed:"1.2.2",Latest:"1.2.2",Name:"Arduino mbed-enabled Boards"}]
[INFO] Loading package atmel-avr-xminis from: /Users/CritterLab/Library/Arduino15/packages/atmel-avr-xminis/hardware
[INFO] Loaded platform [platform: {ID:"atmel-avr-xminis:avr",Installed:"0.6.0",Latest:"0.6.0",Name:"Atmel AVR Xplained-minis"}]
[INFO] Loading package builtin from: /Users/CritterLab/Library/Arduino15/packages/builtin
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/builtin/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/builtin/tools
[INFO] Loaded tool [tool: Version: 5.8-arduino11]
[INFO] Loaded tool [tool: Version: 1.0.0]
[INFO] Loading package emoro from: /Users/CritterLab/Library/Arduino15/packages/emoro/hardware
[INFO] Loaded platform [platform: {ID:"emoro:avr",Installed:"3.2.2",Latest:"3.2.2",Name:"EMORO 2560"}]
[INFO] Loading package esp32 from: /Users/CritterLab/Library/Arduino15/packages/esp32/hardware
[INFO] Loaded platform [platform: {ID:"esp32:esp32",Installed:"1.0.4",Latest:"1.0.4"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/esp32/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/esp32/tools
[INFO] Loaded tool [tool: Version: 2.6.1]
[INFO] Loaded tool [tool: Version: 0.2.3]
[INFO] Loaded tool [tool: Version: 1.22.0-80-g6c4433a-5.2.0]
[INFO] Loading package esp8266 from: /Users/CritterLab/Library/Arduino15/packages/esp8266/hardware
[INFO] Loaded platform [platform: {ID:"esp8266:esp8266",Installed:"2.7.1",Latest:"2.7.1"}]
[INFO] Checking existence of 'tools' path: /Users/CritterLab/Library/Arduino15/packages/esp8266/tools
[INFO] Loading tools from dir: /Users/CritterLab/Library/Arduino15/packages/esp8266/tools
[INFO] Loaded tool [tool: Version: 2.5.0-4-fe5bb56]
[INFO] Loaded tool [tool: Version: 2.5.0-4-b40a506]
[INFO] Loaded tool [tool: Version: 3.7.2-post1]
[INFO] Loaded tool [tool: Version: 2.5.0-4-b40a506]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Documents/Arduino/libraries, location: user]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/esp8266/hardware/esp8266/2.7.1/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/avr/1.8.3/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/megaavr/1.8.6/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/sam/1.6.12/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/samd/1.8.6/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/samd_beta/1.6.25/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino/hardware/mbed/1.1.4/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/emoro/hardware/avr/3.2.2/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/Heltec-esp32/hardware/esp32/0.0.5/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/arduino-beta/hardware/mbed/1.2.2/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/atmel-avr-xminis/hardware/avr/0.6.0/libraries, location: platform]
[INFO] Adding libraries dir [dir: /Users/CritterLab/Library/Arduino15/packages/esp32/hardware/esp32/1.0.4/libraries, location: platform]**

[ubidefeo]

your problem is a wrong URL which ends in .jsonc rather than json so the URL is not found.

for documentation purposes the easiest way to make this work is to add the list of additional urls in this format

additional_urls:
    - https://dl.espressif.com/dl/package_esp32_index.json
    - http://arduino.esp8266.com/stable/package_esp8266com_index.json
    - https://github.com/stm32duino/BoardManagerFiles/raw/master/STM32/package_stm_index.json

to use yaml's array format type them this way

additional_urls: [
    "https://dl.espressif.com/dl/package_esp32_index.json",
    "http://arduino.esp8266.com/stable/package_esp8266com_index.json"
  ]

remember to update the core index before searching/installing

arduino-cli update (updates index cor libraries and cores
or
arduino-cli core update (only updates core index)