Manipulator Builder null?

Plugins Plugin Development
1

Hey all,

I’m trying to get a ManipulatorBuilder for stone, and for some reason I keep getting the following error:

Which is weird, because this has usually worked before:

https://github.com/El-minadero/OreVeins/blob/Remastered/OreVeins/src/main/java/net/kevinmendoza/oreveins/customRocks/Rock.java#L78

This is using the 1.8.9 api.