@darkpaw thanks for the reply. The project files were originally on the desktop of my old MacBook. I moved the contents of that desktop to iCloud so I could access that desktop from my new MacBook.
So yes, currently the projects in question are stored and opened from iCloud. But I get the same results if I try to open from other locations. I understand moving files can mess sh*t up.
What I don't get is how this has affected all my GitHub repos.
I will be raising fb as you suggested.
Topic:
App & System Services
SubTopic:
iCloud & Data