Github Nuget Packages

Hello,

I have packages in my private account as well as in that of my organisation, which I have always used. Now I wanted to add new to them, so I created a new PAT and tried it out a bit. But now I have the problem that my packages can no longer be accessed. I can access the link:
https://nuget.pkg.github.com/MartinBartolome/index.json
but when I try to add this in Visual Studio I get the error message: “Failed to retrieve metadata from source ‘https://nuget.pkg.github.com/MartinBartolome/query?q=&skip=0&take=26&prerelease=false&supportedFramework=.NETFramework,Version=v4.8&semVerLevel=2.0.0’.
Response status code does not indicate success: 500 (Internal Server Error).” When I call the link I get the text: {“error”: “The GitHub Packages service encountered an error.”} . Can anyone help me?

PAT has the rights to all repos, as well as write and delete packages.