We are getting a bad server crash with the Enigmatica 6 modpack and using the crusher demon. Giving the demon an ore chunk from the Emendatus Enigmatica mod causes the crash.

I posted a bug report on the Occultism Github: klikli-dev/occultism#287

Thanks for the report. The next time you report a bug, please use the bug template, and specify modpack version :)

Ah...well it wasn't your bug, but ok