The current version doesn't work on snapshots.
I'll provide a crash report if needed.

Oh nice,
huge thanks to @jellysquid3 for the mod.

This is a clearly intended behavior as it is written for 1.15. Once more development has been done jelly will start to work on porting the mod to other game versions.

Actually,
someone created a 1.16 fork of the mod:
https://github.com/mrmangohands/sodium-fabric