java.lang.reflect.InvocationTargetException: null

I'm currently developing a very barebones Forge mod on 1.18.2.

I'm trying to make my own ore and after I added a get icon (see *) function, it suddenly doesn't work.

LOG: https://gist.github.com/TheCodingPlace/343fc4ce00a93d70408bc31aa67760a6

*

package com.example.gfm.setup;

import net.minecraft.world.item.CreativeModeTab;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;

public class ModSetup {

    public static final String TAB_NAME = "Generic Forge Mod";

    public static final CreativeModeTab ITEM_GROUP = new CreativeModeTab(TAB_NAME) {
        @Override
        public ItemStack makeIcon() { return new ItemStack(Items.NETHERITE_INGOT); }
    };


    public static void init(FMLCommonSetupEvent event) {

    }
}