I had a similar issue, what version of unity are you using? Mine wouldn't build on 2021.3 but when I switched to 2020.3 it worked
Hi. Thanks for replying. In fact, I just this minute updated to 2022.1 (from 2021.3) and it works with that, so I'm back on track! Thanks again, and good luck with the jam!
Awesome, glad to hear it! thanks and good luck to you as well!