During the process of building the Docker image for AWX version 24.6.1, make sdist is executed:
As a result, it is likely that the latest main branch of ansible-ui has been cloned, built and included as the UI.
Since the latest ansible-ui is based on an unreleased plaggable architecture, I believe that various authentication methods that should exist in version 24.6.1 are hidden.
The Makefile and Dockerfile are complex, so I can’t provide a simple workaround immediately, but I suspect the cause is as mentioned above.