Error 307 usually means that you, specifically, were booted from server. Not a problem with the server itself. Often happens if there is something wonky with your network connection and game server thinks you may be part of a DDoS attack. For me, if my internet connection drops out briefly, I often get an Error 307. Like I hit the server with too much queued data after my connection comes back up, and it thinks I am trying to overwhelm the server. You are essentially put in a timeout by the server and just need to wait it out. Usually like 10 to 15 minutes.

Has ruined some good IA runs for me since that is long enough for instance to reset. :-(