Webplayback SDK not working as Premium user

[Meyborg]

Plan

Premium

Country

Germany

Device

MacBook Pro

Operating System

OSX

My Question or Issue

I'm using the Web Playback SDK as a Premium User. As of today I get 'This functionality is restricted to premium users only' in the java script console when I try to play a song. I'm talking about a webapp that I have developed.
I had a friend of mine that is also a Premiun User test the webapp and he also got this message.

Yesterday everything was working fine. No changes have been made to my webapp.