[sidusar]

If it -returns- them to the Terminal, probably their invitation is fine but something else is going wrong. If I recall correctly, not having an invitation means you can't even click the 'join' button.

Unless there's some kind of pattern, like all new accounts can't get in, this is probably just the random Ring issues that have been there since the start. There have always been random cases of people being unable to join a scenario or getting kicked out halfway through. This is heavily dependant on the individual, with some people never experiencing any problems and some people never being able to join any scenario at all.