Well I have had a problem like that where I had deleted my cache and that message popped up. What I did is logged into my retail account and then closed down my wow. Pretty much I just had to log into the server in order for it to work.
The name is blurry. I can't ban him/her if the name is blurry...... I just noticed I was afk right there........ Sorry Riaden. If you can get me the name I will deal with this.