Marked as Solution for Visibility. This is still an open issue.
**FIX** possibly?
My daughter made a new character, moved him into Strangerville then enrolled him in University. He moved to the dorm and completed the first term, then enrolled in a second term. About half way through the term he made a robot in the commons building. After they returned to the dorm, it said the robot had to leave as he was not enrolled.
The packing up event began, so she decided to enrol the robot in university. He began the term and the event interface went away but the game still acted like an event was active (no saving, travelling, CAS, etc.) She dis-enrolled him and the event popped up and kept repeating and they were both unable to leave the lot.
She tried to join a club and start an event on a different lot, but that event forced itself to the home lot/dorm and didn't stop the other event. She then removed the robot from the family, which did allow the robot to leave but the packing event was still active for the first guy. Lastly, she went to the calendar and started a dance party on another lot. This did work and appears to have fixed the problem. Of course the remaining guy was still enrolled (not leaving) so this might not work for all situations.