zimavi

I've tried to do something, and it suddenly started working. Parchment mapping helped me.

I removed it, but it didn't change the error in any way.

Hello, Forge community! I am trying to make a custom creative tab with hidden items (like command blocks). When I using it on server I get "java.lang.AbstractMethodError: Missing implementation of resolved method 'abstract net.minecraft.world.item.ItemStack m_6976_()' of abstract class net.minecraft.world.item.CreativeModeTab." error. How can I fix this problem? My code for creative tab: public class OperatorCreativeTab { public static CreativeModeTab OPERATOR_TAB; public static void init() { OPERATOR_TAB = new CreativeModeTab("operator_tab") { @Override @OnlyIn(Dist.CLIENT) public void fillItemList(NonNullList<ItemStack> list) { super.fillItemList(list); list.add(Items.COMMAND_BLOCK.getDefaultInstance()); list.add(Items.CHAIN_COMMAND_BLOCK.getDefaultInstance()); list.add(Items.REPEATING_COMMAND_BLOCK.getDefaultInstance()); list.add(Items.COMMAND_BLOCK_MINECART.getDefaultInstance()); list.add(Items.JIGSAW.getDefaultInstance()); list.add(Items.STRUCTURE_BLOCK.getDefaultInstance()); list.add(Items.STRUCTURE_VOID.getDefaultInstance()); list.add(Items.BARRIER.getDefaultInstance()); list.add(Items.DEBUG_STICK.getDefaultInstance()); CompoundTag blockStateTag; ItemStack lightBlockWithNbt; for(int i = 15; i > -1; i--) { blockStateTag = new CompoundTag(); blockStateTag.putInt("level", i); lightBlockWithNbt = Items.LIGHT.getDefaultInstance(); lightBlockWithNbt.addTagElement("BlockStateTag", blockStateTag); list.add(lightBlockWithNbt); } } @Override @OnlyIn(Dist.CLIENT) public ItemStack makeIcon() { return Items.COMMAND_BLOCK.getDefaultInstance(); } @OnlyIn(Dist.CLIENT) @Override public ItemStack getIconItem() { return Items.COMMAND_BLOCK.getDefaultInstance(); } }; } }