I have been receiving an error message when trying to add a team member to an unpublished course. They were previously assigned as a student to two other courses with no issue, but no matter what I try to add them as (Student, Observer, Teacher), I keep getting the same error message. They've confirmed that they have not had any issues logging in previously. I also tried uploading their information using the SSI import again, and still had no luck. I've also confirmed with our leadership that this team member has admin access. Need help figuring out what verification is required.