Same here on Nagrand EU.
Can log in to other servers fine (Twisting Nether and Al’akir) but not to my main. Been away on vacation and first time i logged on to Battle.net just now, i got a message along the line of: It could not find my game files in the directory, please check pathway or re-install game. After restarting the computer that wasn’t an issue anymore though.
My characters on the Runetotem server are not showing too, the screen looks black, I can’t create new characters
the problem has been going on for a couple of hours, I was playing, I had to restart the game and since then there has been this problem.
The Runetotem server seems to be online, my characters on other servers are working fine.