I'm running into the same error other people have, but theirs were all from months if not over a year ago, and mine's just happening now. Host and other DNN accounts log in fine, but AD accounts get this message on first login attempt:
A critical error has occurred.
Unknown UserCreateStatus value encountered Parameter name: UserRegistrationStatus
and this message on subsequent logins:
A critical error has occurred.
Redirect URI cannot contain newline characters.
I have uninstalled and reinstalled the provider, checked the settings, tried w/ and w/o role sync enabled. I have two separate instances of DNN on this server in two app pools, both running DNN 4.9.2 and AD 1.0.5. The other one works fine, but this portal just doesn't want to work properly.
Any ideas? I can't think of what's different and one and not the other with regards to this problem.