TypeError when loading UPS shipping rates if no allowed shipping methods selected

[NicholasRoge]

Preconditions (*)

1. Magento version 2.4.3
2. Admin - Stores - Configuration - Sales - Shipping Methods - UPS shipping method is set up with no "Allowed Methods" selected
3. cache clear
4. Front end - Login as customer - Add a product to Cart
5. Proceed to checkout - Enter Shipping Address
   Issue: No other shipping methods are displayed and error is displayed on UI. Unable to proceed with payment.

Steps to reproduce (*)

1. Add test simple product to cart
2. Proceed to checkout
3. Enter shipping address

Expected result (*)

My expectation is that the exception should never occur in the first place and the carrier should return no rates if there are no allowed shipping methods

Actual result (*)

Actual result is that all rates fail to load and no error is logged to indicate that there is an issue.

If you attempt to load rates an RMA request however, the following error which is caused by the issue in question is logged:

[2021-10-22 20:57:42] report.CRITICAL: Type Error occurred when creating object: Magento\Rma\Block\Adminhtml\Rma\Edit\Tab\General\Shipping\Methods, explode() expects parameter 2 to be string, null given [] []
[2021-10-22 20:57:42] report.CRITICAL: Type Error occurred when creating object: Magento\Rma\Block\Adminhtml\Rma\Edit\Tab\General\Shipping\Methods, explode() expects parameter 2 to be string, null given [] []
[2021-10-22 20:57:42] report.CRITICAL: Error: Call to a member function toHtml() on bool in /var/www/html/vendor/magento/module-rma/Controller/Adminhtml/Rma/ShowShippingMethods.php:52
Stack trace:
#0 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods->execute()
#1 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->___callParent()
#2 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->Magento\Framework\Interception\{closure}()
#3 /var/www/html/generated/code/Magento/Rma/Controller/Adminhtml/Rma/ShowShippingMethods/Interceptor.php(23): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->___callPlugins()
#4 /var/www/html/vendor/magento/framework/App/Action/Action.php(111): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->execute()
#5 /var/www/html/vendor/magento/module-backend/App/AbstractAction.php(151): Magento\Framework\App\Action\Action->dispatch()
#6 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Backend\App\AbstractAction->dispatch()
#7 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->___callParent()
#8 /var/www/html/vendor/magento/module-backend/App/Action/Plugin/Authentication.php(143): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->Magento\Framework\Interception\{closure}()
#9 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(135): Magento\Backend\App\Action\Plugin\Authentication->aroundDispatch()
#10 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->Magento\Framework\Interception\{closure}()
#11 /var/www/html/generated/code/Magento/Rma/Controller/Adminhtml/Rma/ShowShippingMethods/Interceptor.php(32): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->___callPlugins()
#12 /var/www/html/vendor/magento/framework/App/FrontController.php(245): Magento\Rma\Controller\Adminhtml\Rma\ShowShippingMethods\Interceptor->dispatch()
#13 /var/www/html/vendor/magento/framework/App/FrontController.php(212): Magento\Framework\App\FrontController->getActionResponse()
#14 /var/www/html/vendor/magento/framework/App/FrontController.php(147): Magento\Framework\App\FrontController->processRequest()
#15 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\App\FrontController->dispatch()
#16 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(138): Magento\Framework\App\FrontController\Interceptor->___callParent()
#17 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(153): Magento\Framework\App\FrontController\Interceptor->Magento\Framework\Interception\{closure}()
#18 /var/www/html/generated/code/Magento/Framework/App/FrontController/Interceptor.php(23): Magento\Framework\App\FrontController\Interceptor->___callPlugins()
#19 /var/www/html/vendor/magento/framework/App/Http.php(116): Magento\Framework\App\FrontController\Interceptor->dispatch()
#20 /var/www/html/vendor/magento/framework/App/Bootstrap.php(264): Magento\Framework\App\Http->launch()
#21 /var/www/html/pub/index.php(29): Magento\Framework\App\Bootstrap->run()
#22 {main} [] []

---

Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @NicholasRoge. Thank you for your report.
To speed up processing of this issue, make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, Add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, review the Magento Contributor Assistant documentation.

Add a comment to assign the issue: @magento I am working on this

To learn more about issue processing workflow, refer to the Code Contributions.

---

• Join Magento Community Engineering Slack and ask your questions in #github channel.

⚠️ According to the Magento Contribution requirements, all issues must go through the Community Contributions Triage process. Community Contributions Triage is a public meeting.

🕙 You can find the schedule on the Magento Community Calendar page.

📞 The triage of issues happens in the queue order. If you want to speed up the delivery of your contribution, join the Community Contributions Triage session to discuss the appropriate ticket.

🎥 You can find the recording of the previous Community Contributions Triage on the Magento Youtube Channel

✏️ Feel free to post questions/proposals/feedback related to the Community Contributions Triage process to the corresponding Slack Channel

[NicholasRoge]

@magento I am working on this

[m2-assistant]

Hi @NicholasRoge! 👋
Thank you for collaboration. Only members of Community Contributors Team are allowed to be assigned to the issue. Please use @magento add to contributors team command to join Contributors team.

[NicholasRoge]

@magento add to contributors team

[m2-assistant]

Hi @NicholasRoge! 👋
Thank you for joining. Please accept team invitation 👉 here 👈 and add your comment one more time.

[NicholasRoge]

@magento I am working on this

[m2-assistant]

Hi @engcom-November. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

  If the issue has a valid description, the label Issue: Format is valid will be added to the issue automatically. Please, edit issue description if needed, until label Issue: Format is valid appears.

• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue. If the report is valid, add Issue: Clear Description label to the issue by yourself.

• 3. Add Component: XXXXX label(s) to the ticket, indicating the components it may be related to.

• 4. Verify that the issue is reproducible on 2.4-develop branch

  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!

• 5. Add label Issue: Confirmed once verification is complete.

• 6. Make sure that automatic system confirms that report has been added to the backlog.

[engcom-November]

Verified the issue on Magento 2.4-develop branch and the issue is reproducible:

Exception stack trace:
[2021-12-24T11:27:33.855730+00:00] main.CRITICAL: TypeError: explode() expects parameter 2 to be string, null given in /var/www/html/mg24/magento2/app/code/Magento/Ups/Model/Carrier.php:920 Stack trace: #0 /var/www/html/mg24/magento2/app/code/Magento/Ups/Model/Carrier.php(920): explode() #1 /var/www/html/mg24/magento2/app/code/Magento/Ups/Model/Carrier.php(858): Magento\Ups\Model\Carrier->_parseXmlResponse() #2 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/Async/CallbackDeferred.php(99): Magento\Ups\Model\Carrier->Magento\Ups\Model\{closure}() #3 /var/www/html/mg24/magento2/generated/code/Magento/Shipping/Model/Rate/Result/ProxyDeferred.php(61): Magento\Framework\Async\CallbackDeferred->get() #4 /var/www/html/mg24/magento2/generated/code/Magento/Shipping/Model/Rate/Result/ProxyDeferred.php(92): Magento\Shipping\Model\Rate\Result\ProxyDeferred->wait() #5 /var/www/html/mg24/magento2/generated/code/Magento/Shipping/Model/Rate/Result/ProxyDeferred.php(93): Magento\Shipping\Model\Rate\Result\ProxyDeferred->getError() #6 /var/www/html/mg24/magento2/app/code/Magento/Shipping/Model/Rate/CarrierResult.php(41): Magento\Shipping\Model\Rate\Result\ProxyDeferred->getError() #7 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/Quote/Address.php(1081): Magento\Shipping\Model\Rate\CarrierResult->getAllRates() #8 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/Quote/Address.php(1004): Magento\Quote\Model\Quote\Address->requestShippingRates() #9 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/Quote/Address/Total/Shipping.php(83): Magento\Quote\Model\Quote\Address->collectShippingRates() #10 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/Quote/TotalsCollector.php(261): Magento\Quote\Model\Quote\Address\Total\Shipping->collect() #11 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/ShippingMethodManagement.php(330): Magento\Quote\Model\Quote\TotalsCollector->collectAddressTotals() #12 /var/www/html/mg24/magento2/app/code/Magento/Quote/Model/ShippingMethodManagement.php(283): Magento\Quote\Model\ShippingMethodManagement->getShippingMethods() #13 [internal function]: Magento\Quote\Model\ShippingMethodManagement->estimateByAddressId() #14 /var/www/html/mg24/magento2/app/code/Magento/Webapi/Controller/Rest/SynchronousRequestProcessor.php(95): call_user_func_array() #15 /var/www/html/mg24/magento2/app/code/Magento/Webapi/Controller/Rest.php(188): Magento\Webapi\Controller\Rest\SynchronousRequestProcessor->process() #16 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/Interception/Interceptor.php(58): Magento\Webapi\Controller\Rest->dispatch() #17 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/Interception/Interceptor.php(138): Magento\Webapi\Controller\Rest\Interceptor->___callParent() #18 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/Interception/Interceptor.php(153): Magento\Webapi\Controller\Rest\Interceptor->Magento\Framework\Interception\{closure}() #19 /var/www/html/mg24/magento2/generated/code/Magento/Webapi/Controller/Rest/Interceptor.php(23): Magento\Webapi\Controller\Rest\Interceptor->___callPlugins() #20 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/App/Http.php(116): Magento\Webapi\Controller\Rest\Interceptor->dispatch() #21 /var/www/html/mg24/magento2/generated/code/Magento/Framework/App/Http/Interceptor.php(23): Magento\Framework\App\Http->launch() #22 /var/www/html/mg24/magento2/lib/internal/Magento/Framework/App/Bootstrap.php(264): Magento\Framework\App\Http\Interceptor->launch() #23 /var/www/html/mg24/magento2/pub/index.php(30): Magento\Framework\App\Bootstrap->run() #24 {main} [] []