This happen every so often. I need to way 12-24hours for it to start working again.
It does not help to role back a few versions of my app.
It does not help to download my app and upload it again....
I have made several support-tickets to Microsoft, but all they can say is "next time it happens make a ticket so we can view the error live". But as soon as they answer my ticket the error is gone and they have no way of helping.