Interestingly, I run into this because there seems to be a bug when coming back from sanctum edit where your playerstart_rerun.json file gets messed up. Not sure why. I looked at the logs, compared my file to my wife’s computer, and noticed the leader.json file and went digging.
If you didn’t see the lighting thread, it’s here: How to Change Sanctum Lighting [Basic Tutorial PC] ☀