I have just upgraded from 3.5.5 to 3.7.2 and now this has broken the site and no longer able to SSO.
No authenticationScheme was specified, and there was no DefaultChallengeScheme found. The default schemes can be set using either AddAuthentication(string defaultScheme) or AddAuthentication(Action configureOptions).
Greeetings. I’m experiencing this issue after a several-version upgrade on our test PU server. We tried version 3.7.10 and see the same issue on startup where the message “No authenticationScheme was specified, and there was no DefaultChallengeScheme found.” appears when opening the site. (also appears as exception in log file).
Any movement on this known issue since 3.7.2?