It seams a conflict with "supersaturation" mod.
crash-2024-05-22_00.01.41-server.txt

Thanks, Will look into this a hopefully get a fix into the next version

This is an issue with supersaturation, I made a PR to their mod, if they merge it in it should fix the issue. I also added a change in the Crystal Apple so it won't crash anymore, but supersaturation won't work correctly with it.

Workaround available in 1.20.1-1.6.1. Fix will be on supersaturation's side.