My client gets stuck on "connecting" everytime i try to login, and says "convert to battlenet account".

I have already deleted the cache and WTF folders, and changed the realmlist in the new folder.

I have been playing smoothly for months now, Idk what changed today, and now I get this error. I have solved this once before by changing realmlist, months ago, but now it seems to not work.

Help would be appreciated, thanks. :)