Here’s the exact error
C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V140\Microsoft.MakeFile.Targets(46,5): error MSB3073: The command ““C:\Program Files (x86)\Epic Games\4.13\Engine\Build\BatchFiles\Rebuild.bat” ProLangBPPCEditor Win64 Development “C:\Users\georg\Documents\Unreal Projects\ProLangBPPC\ProLangBPPC.uproject” -waitmutex” exited with code -1