Crash on 1.21.4

[PencilVoid]

Crash log

[MightyKnight]

Until my PR #5 gets merged and uploaded to Modrinth, you can get a version from my branch here: https://github.com/MightyKnight/Pick-BlockState/tree/1.21.5.

But you need to compile it yourself.
Quick guide: Download, extract folder, then use ./gradlew build or ./gradlew.bat build (Windows), and then the .jar will be generated in the subfolder /build/libs.