How to fix Visual Studio C# Project Properties not showing?

Question

When I try to open ANY c#(also new project created at the moment), I can't view its properties. I got this error(translated):

An error occurred while trying to load project properties window. Close the window and retry. The value cannot be null. Parameter name: val

I tried to restore vs, also tried this method: https://social.msdn.microsoft.com/Forums/azure/en-US/3fb200e0-14cf-4684-bb7f-71b7808a1f83/project-not-loading-properly?forum=visualstudiogeneral

But none of those worked..

Answer 1

Solved by UPDATING (not restoring/repairing) Visual Studio to last build. That doesn't make any sense by the way: like 2 months ago this version worked too(incl. project properties page). I guess when Microsoft releases updates it forces you somehow to update its softwares.