I am having the same issue, I had no problem and was playing for hours then I suddenly got booted out to the server selection screen with a message saying the server was full. Completely frustrated. Also checked the website for server status, it should the server as being lightly populated, and system alerts and there were none. Wish they would at least post what the issue is so that we have some clue. Occasionally while attempting to login it has flashed a brief message saying that my game version does not match the server version and to restart the game. Even when I tried that it didn't change anything. As Guildmaster, with the rest of my guildmates still logfed in and awaiting my return, this has been beyond frustrating.