Upon attempting to login to battle.net, I sometimes get the error BLZBNTBGS80000011, along with a failed login attempt message. Trying to log in to the game, I get several different errors with a disconnect message, most often BLZ51901016. If by some chance I make it in, there are no issues unless I am attempting to move to a different instance (IE moving to a different zone or entering dungeons and raids), in which case I fail to transfer and get an error message saying Transfer Aborted: Instance not found.