I did!
however to be honest I completely forgot I posted this question and I’ve also had to make further changes since solving this one and I can’t remember what the original solution was.
I’ll have a think and post back if I do remember, sorry.
Edit:
It’s quite possibly not the answer, and even more so not the solution for you; but I think one of the earliest fixes I did involved the Game Icon file. I think originally I just renamed a .jpg image to .ico hoping that would work. It showed fine in the Project Settings window, but it wasn’t until I actually made the file a proper .ico file that the project ran.
Like I said this may not be your solution, and I can’t remember if I did this fix before or after asking someone else to run it on their machine, but it definitely was an early fix for the issues I was having.