i tried to fix with: deleting content, intermediate and saved folders. then opened the .uproject. it created the deleted folders, but it still didnt open the project. only windows restart helps.
If you create a new one it happens too? Perhaps the problem is in the config folder, a variable for example…
Also try to verify the engine
even with new project, yes. verify didnt help
If it happens even in a new project, and verification doesn’t help, then uninstall and reinstall the engine. Because it is not a problem for your project.
Perhaps there is a requisite that was uninstalled, like a runtime.
It happens to me days ago, in my case, I did fix installing Visual Studio, but is a bit more complicated than reinstall: