Crashlog: The game crashed whilst ticking block entity
Error: java.lang.NullPointerException: Cannot invoke "java.util.Map.get(Object)" because "com.Apothic0n.MoltenVents.core.objects.ActiveMoltenBlockEntity.conductiveMap" is null

Version: 1.20.1

I was using an active molten vent block by itself, and it crashes most of the time.

This is most likely caused by an incorrectly made datapack, provide log.

Also if you do want to fix it you should ask for support in the discord instead, I rarely will check these github issue things.