Very straight forward issue - after joining a game and clicking the red “Leave” button getting the following popup message:
Error
Sorry, we ran into an error.
Error Message: There was an error processing your request.
Ditto this, on Dec 8th trying to leave
(password by request) Alone In The Dark (Not Started)
Try it again, @zarquonwhereareyou - wish I had noticed this earlier, it’s probably been broken for a while. 
Thanks