dotnet tool restore exited with code 9009

New using monogame, started last week and had some simple programs running.
After a short break wanted to restart but none of my projects is building anymore.

I am running Visual Studio 2022, monogame

All I get now is the “dotnet tool restore exited with code 9009” issue.
This also for new created projects just from the template.
Also uninstalled/installed monogame extension with no luck.

From earlier posts I saw it could be related to the contents of the Content.mgcb.
This is what it is for a new project :


Any hint for solution or documentation of this is welcome.