When you try the "user path". Like go to login page try to connect with SSO etc... what happens now? can you send a screenshot etc of what it displays?
Just to make sure wére on the same page and we fix one issue after the other. But tbf I think thats an issue on your side and not a fluxer one
This issue appeared to be on my side. When I tried to get the screenshots of the error everything just worked as expected. If the issue crops up again I'll reopen this ticket but for now the issue appears to be resolved by updating Authentik.
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Comment by @nadd3r