Admin access is disabled when the maximum session size is set to zero. The error occurs substantially because the maximum session size has been reset to ‘ 0 ’ after the Magento upgrade. This terminates the admin session as soon as it’s initiated and therefore redirects the admin to the same login page.
Coming to the result of the Admin login not working after upgrading to Magento2.4.4 to 2.4.5, you need to increase the maximum session size in Magento 2. This can be done by running a simple command in the command line interface. You can run the following command to do that:
bin/magento config:set system/security/max_session_size_admin 2560000
This will change the maximum session size for the admin to 2560000, allowing the admin to log in and access the Magento admin panel.
If you still have any issue feel free to ask and let me know your views to make the better. Share this solution with your other Magento buddies via social media.
Thanks for reading.