Build failed: "CL.exe has exited with exit code 5"

Thank you Visual Studio for the detailed error report about why the build fails! I can finally fix it!

(This is not fixable by running VS as administrator, also the output file is not running nor locked by some process)

WTF why does Visual C++ show an error in some system include BUT NOT THE FUCKING INCLUDE CHAIN DESPITE /showincludes GIVEN???

How the fuck are you supposed to find a wrongly defined macro that way? Go through all 20 layers of includes and map out what could POSSIBLY be the include chain? Seriously WHY??

Does anyone knows why on my vs2015 community there's cl.exe or vsvarsall.bat? I already installed C++ and Python language