Think it is either WGT or a server farm inbetween us and WGT. Just happened to me, tried to reconnect probably 5 or 6 times, kept getting the popup. I am wired, all my equipment lights just fine, internet icon showed connected. Saved game, went to speedtest.net 14ms ping, 225 down and 12 up. Got back on the forum just fine. I am in Georgia, USA, haven't done a trace to see my full routing. I will probably be able to get back into my saved game with no problem.
So the mystery continues.
Edit...yep was able to continue the game just fine.