I invited a player to my campaign world as a subscriber initially. They couldn't access any player character related stuff so I removed them. Then tried to add them as a protagonist but each time they clicked join with their precreated character they would get an Error 404 message. They still appear as a player character but not as a protagonist, even after removing them from the game.

1. Invite character as a subscriber
2. Remove as a subscriber
3. Add as a player character