Didnt you notice that there is a message on the bottom left sayin attempting to reconnect. Somehow u lost your internet connection. That would keep u from being able to do anything, especially log back in.
I believe the connection to one of the servers was broken. GW has more than one server for each continent, thankfully. It seems you still had connection with atleast one of the servers though, thus not getting err7. Though I guess most of this was pretty obvious already.