Hi @Pablo gil
Looks like my previous comment helped you, I converted the comment to an answer. If you have any more issues, please kindly let us know.
Solution:
I created a .NET 6.0 wpf application in Visual Studio 2022 community 17.2.5, pushed it to github, and then loaded the project in Blend for Visual Studio 2022. Blend correctly read the git information of the project and did not encounter this issue.
If you are concerned that the solution is broken, you can try creating a new project to test.
Please check Tools->Options->Source Control->Current source control plug-in, select git. Check if the solution path contains a .git folder (hidden by default).