Soeben habe ich das Probeabo für Firefly abgeschlossen kann es aber nicht nutzen.

Hello @Invisibil,

Thank you for your message. 

It is hard to know what your situation is based on this description and we have no access to your account to look. Can you please reply with the following information:
• A screen shot of the whole browser  (including your avatar in the upper right corner) with the error  showing (not just the error message itself).
• Please click on your avatar in the upper right corner and take a screen shot of the box that pops up, but please black out your name and email address.
• Please go to account.adobe.com and take a screen shot of the left two columns showing which plans you have (but do not include the third column that has payment information).

Thanks,
    droopy