Hi! I'm sorry you're having issues trying to get this to run. Unfortunately, I don't have access to a Mac to test any of the builds, so I'm not aware of anything I can do or not do to package it differently.
I could be wrong, but after poking around a bit, it seems this is a Big Sur problem, and not something I can fix on my end. Someone said this worked for them:
open terminal.
enter sudo chmod -R 777
then drag and drop the application you are trying to open.
click enter
to be in the terminal like this : sudo chmod -R 777 app-path
then enter your password
Try that for me, and if it doesn't work I'll read into it more to see if there is something I can do differently. I appreciate you reaching out with the issue nonetheless, because if it's something I need to fix, I would have never known.