I ran into a strange error recently when I tried to open one of my converted iOS Windows Bridge for iOS.
The project would not load and there was not much of an error message, until I checked the output windows.
Error: The imported project "C:\_CODES\WinObjC\msvc\starboard.props" was not found. Confirm that the path in the <Import> declaration is correct, and that the file exists on disk.
At this point I realized that I was opening this on another machine and that on this machine the WinObjC SDK was not installed in the same path as the other one.
Edit project file find the reference to WINOBJC_SDK_ROOT and change it to the proper location
As mentioned in my other article make sure that you install the SDK in a path that does not contain any spaces in its name.