We are rostered through Clever for Mastery Connect, so our teachers typically log in via Clever as well. we have a handful of teachers who currently cannot log in. When they try, they are taken to an "Oops! You cannot access this page." error. When we try to log in using Mastery Connect's website by entering their credentials, we receive this error: Could not fetch /auth/mc_password/callback, received 500

Has anyone experienced this and how was it resolved? This is not happening to all teachers, only some, and we are not aware of any changes being made to their accounts. As an admin in Mastery Connect, I am able to log in as these teachers. But we cannot log in using their credentials.