Pandaria Cannot connect today

[Madbateman]

Hello,

I've been playing for a month now without any trouble.

But today on the log in screen, I have a message saying "This account needs to be converted to a Battle.net account etc...

I checked the realmlist, emptied the WTF folder (saved it too), nothing changes..

What should I do ?
Thanks

[AdvancedHD]

Same issue. Played earlier today, but now i get that message.