If you’re grabbing the VXGI build straight from Github, the workflow is straightforward:
-unzip
-run setup.bat
-run Generate project files
-open project files in Visual Studio
-select the ‘UE4’ project below ‘engine’ in the Solution viewer on the right, right click->build.
It has to work really, i did it time and time again ^^
edit: looking at your error, are you sure Visual Studio is properly installed? have you tried compiling some random C++?
Looks like there’s issues with the standard library, yet it’s something rather basic 