Failed to load a project when building win10 project

Hi,

2 days ago I've arrived to the office, trying to build my game as a windows 10 universal game. Unity doesn't return any error, but when I try to open solution in Visual Studio it gives me error with loading project: "Object reference not set to an instance of an object."

It is happening on my 2 game projects and even on new and empty unity project and I don't know what to do.

I'm using latest version of Windows10 and Visual Studio 2015 (Community)

Does somebody have the same issue or an advice?



Thanks,
Simon