I had that twice today and got in after restarting the total client.
Never had this before in all time i'm playing.
Now i got some rest, got back after 4 hours and guess what.
SE forums are very slow . start the client . webpage cannot be displayedon client.. finaly i can enter my password.. get to lobby..
Select my character and i am now stuck with a black loading screen for over 15 minutes..

SE whats going on ????