I am updating my mod to 1.12(registry), until i hit a wall when my game crashed with: java.lang.NullPointerException: Can't use a null-name for the registry, object net.minecraft.item.ItemBlock@73ae7ce4.   While debugging i also found that the ArrayList was filled but with null blocks.   I did the same thing for items and that's working fine. Thanks in advance.   (full crash log) My code: @Mod.EventBusSubscriber(modid = Ref.MODID) public class Blo