Cannot join any room : "Moving to lobby"

I just noticed no one has responded to you yet. First of all, this should go in Crossfire Support and have moved it for you.

Secondly, I think a number of players have experienced this and it has been reported and the CF staff have started looking into it. For now, if it happens again, I recommend submitting a support ticket with details (what you were doing when the error occurred, which server/channel, etc, the more details the better).