ActiveDirectory Users' Get Error Instead of Dashboard

When I try to log in with an account from AD, I get an error where the dashboard should be. Logging in with a local account works fine. The error is: Value: The id "K__USv__" is invalid because it ends with two underscores. Along with a traceback. I'm not even sure where K__USv__ is coming from. I do notice that all of my group names from AD look similar, but it doesn't appear the two accounts I've tried this with have that listed as a group they're in. Can someone help me track down my issue Thanks.