Rancher ADFS /SAML gives 405 http error


I am trying to configure Rancher ADFS with Authentik. So far so good, i followed the guide on Rancher | authentik . After i click enable, i am being redirected to the authentik authentication. After that, the application (rancher) is sucessfully registered in Authentik. However, when redirecting back to the url https://url/v1-saml/adfs/saml/acs?SAMLResponse= things go wrong. The browser throws a 405 Method not allowed.

  • Where can i find logs in Rancher regarding authentication?
  • How to troubleshoot?

FYI: I have no reversed proxy between the Rancher instance and my browser. Rancher runs in a docker container for the time being.