[1MSC] Immediate Unexpected Disconnection

After dying in the final boss room of The Coward's Trial, attempting to get back into the map results in an immediate unexpected disconnection.

http://i.imgur.com/xGBTsep.png

Have tried getting back in 3 times already, same results every single time.

Edit: Appears that the map somehow got corrupted or something. Even a party member couldn't connect to it.