I get an error even with the empty script in C# “Couldn’t set project path to: C:\ …” I almost done everything in the link - link - but it doesn’t changed my situation. How can I set project path properly?
Have you checked all the folders are correct, and you are using the correct path? You could always go through the project and double click a scene to open up Unity and force it to use that folder. It might work, sometimes I use that method when nothing else is working, I also make sure I open as admin.