Failed to open descriptor file @ (../../../'username'/)

Hi, I’m attempting to run a packaged build on a Win machine other than my authoring computer. I can get a packaged build up and running (on my authoring), but everything I’ve tried to get it running on another machine results in the error : Failed to open descriptor file @ (…/…/…/‘Windows username’/).

I’ve tried zipping up the build before sending it, I’ve tried every kind of build and none of that is working. Any tips on how to diagnose this would be greatly appreciated. It is confusing as the folder it is claiming to look in has nothing to do with my packaged build. My windows username has no clear relationship with the project/Binaries/Win64 folder where the build is?