Windows ue4 4.19 uwp fork keeps failing to generate .exe file on export

I am using the ue4 fork on UWP, but every time I try to export everything goes find until it tries to generate the .exe of the game which is where it fails and then exits with code 5. Whats going on? I have been working on this for a week. I am using windows 10 64 bit to be clear.