"Could not log in to (wow) at this time"

I have been randomly getting this error almost daily.
I sometimes dual log on my other account right before this happens.

Is it a lock? A restriction? What is the downtime for me?

Thank you.

I got the same problem!
I could only log in just one time before I started getting this error.

Edit: I fixed it by following this steps: https://www.sevenforums.com/tutorial...exception.html