UnrealBuildTool Exception: Can't Find 'Sources' folder

I’m trying to use Jenkins CI to build Unreal Games, (using: Patrice Vignola - Automation With Unreal Engine And Jenkins-CI)
. The post is a little outdated, but I seem to be finding the correct folders for things and its working in that regard. However, the build fails cause it can’t find a sources folder to build from. Haven’t found anything related to the error online. (UnrealBuildTool Exception: Can’t Find ‘Sources’ folder)

You can see more detail, and the console logs here:
http://play.theendlessweb.com:8080/job/Puzzle%20Game/lastFailedBuild/console

Hm, added an empty folder and its working now. Different error involving a Windows 8.1 SDK, so I guess I’m installing that