Error: Unknown Cook Failure

I am building a ‘start in VR’ project for Windows 32-bit and I use C++. Everything compiles without warnings or errors but when packaging the project it gives me the response ‘Error: Unknown Cook Failure’. I know there are several of these questions already but after spending hours following the various instructions there, deleting Saved and Intermediate folders, restarting my computer. I can successfully build another VR starter project so i’m at a loss.

Attached is the output from the packaging process, it mentions errors to do with Engine source and Attachment rules but I’m not sure where to go with those as they don’t reference any of my source files.

Any help would be greatly appreciated, thank you.

The failure to cook was a combination of building from visual studio in Development mode not Development Editor mode and the use of Component->AttachToTransform() in place of Component->SetupAttachment within various constructors. Builds perfectly now and my final submission for my degree is in.