Clean 4.2 engine build with error MSB3073, C1083, swarninterface

Hi ,

I downloaded all the files (source code.zip; source code.tar.gz; required1of2.zip ; required 2of2.zip; optional.zip) on GitHub (3 times) but everytime it’s writting that:

Setting up Unreal Engine 4 project files…

GenerateProjectFiles ERROR: It looks like you’re missing some files that are required in order to generate projects. Please check that you’ve downloaded and unpacked the engine source code, binaries, content and third-party dependencies be
fore running this script.

Appuyez sur une touche pour continuer…

Maybe I haven’t unzip the package in the good folder. I tried many solutions but it doesn’t work.

Thank you