After upgrade to SonarQube 10.4 login using GitLab on-prem instance does not work anymore

Just upgrade from 10.3 to 10.4 and I can’t log in anymore using our GitLab (16.8) on-prem authentication method. Essentially we are locked out of the UI, while analysis are still working.

Please help since this is a big disruption for us.

Screenshot 2024-02-08 at 16.41.54
Screenshot 2024-02-08 at 16.42.11

Logging in with local account works, the authentication configuration looks good

I just noticed that this is an already known bug.

Here a workaround.