[Issue] Admin login issue fix.

[m2-assistant]

This issue is automatically created based on existing pull request: #32099: Admin login issue fix.

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Description (*)

Related Pull Requests

Fixed Issues (if relevant)

1. None

Manual testing scenarios (*)

1. Install Magento 2 with --use-rewrites=0 option or set web/seo/use_rewrites to 0 in core_config_data_table.
2. Open URL <magento host>/<backend front name>/ in incognito browser mode.
3. Try to log in as admin.

Actual result

Not logged in - page <magento host>/<backend front name>/ reloaded.

Expected result

Logged in.

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)