Following this SO question, I am trying to invite a new user (rep < 20) to a chat room
(a bit in the spirit of my previous question about chat invitation).
I have created the Jenkins room and tried to grant access to SO user Mavig through the "Chat room access control" interface.
Neither his name nor its id or url are working though: it always triggers a
"Oops! Something Bad Happened!"
Is this because Mavig is a relatively new user (5 days) and "unregistered"?