Fail2ban failregex filter not working

I run home assistant in a docker container behind a nginx reverse proxy (also in a container).
I have fail2ban installed on host pc and it works fine with various other container services I run.
I followed the standard tutorial for fail2ban but the filter is not catching any failed logins:

I am a total noob at regex, so if anyone can give a bit of guidance here, it is greatly appreciated :wink:

Same here, did you manage to fix it?

Afraid not :face_with_raised_eyebrow:
After much internet searchng, the best I could find was the following (which I couldn’t get to work either)