Hi Jan,
An Xbox Live error may occur if your computer is unable to connect properly to the Xbox Live Servers. It is also possible that the Xbox App is corrupted or there is an issue with your Xbox Live Profile. To properly isolate your concern, please provide us the following information:
- What troubleshooting steps have you tried so far to resolve the issue?
- Are you still able to play other Microsoft games online?
- Have you tried to sign out and sign in to your account on the Xbox App?
- Did you make any changes to your computer or your network settings prior to the issue?
In the meantime, you may check and follow the solutions provided on this linkto resolve issues with Microsoft Solitaire Collection.