1.20 working

src/main/java/com/jenny/xp2items/Xp2Items.java

@@ -14,8 +14,8 @@ public class Xp2Items {
 
     public static final String MODID = "xp2items";
 
-    public Xp2Items(FMLJavaModLoadingContext context) {
-        IEventBus modEventBus = context.getModEventBus();
+    public Xp2Items() {
+        IEventBus modEventBus = FMLJavaModLoadingContext.get().getModEventBus();
 
         items.register(modEventBus);
         creativeTab.register(modEventBus);

src/main/java/com/jenny/xp2items/items/items.java

@@ -1,8 +1,5 @@
 package com.jenny.xp2items.items;
 
-import net.minecraft.core.registries.Registries;
-import net.minecraft.resources.ResourceKey;
-import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 import net.minecraftforge.eventbus.api.IEventBus;
 import net.minecraftforge.registries.DeferredRegister;
@@ -14,7 +11,7 @@ import static com.jenny.xp2items.Xp2Items.MODID;
 public class items {
     public static final DeferredRegister<Item> ITEMS = DeferredRegister.create(ForgeRegistries.ITEMS, MODID);
 
-    public static final RegistryObject<Item> XP_TALISMAN = ITEMS.register("xp_talisman", () -> new xpTalisman(new Item.Properties().setId(ResourceKey.create(Registries.ITEM, ResourceLocation.fromNamespaceAndPath(MODID, "xp_talisman"))).stacksTo(1)));
+    public static final RegistryObject<Item> XP_TALISMAN = ITEMS.register("xp_talisman", () -> new xpTalisman(new Item.Properties().stacksTo(1)));
 
     public static void register(IEventBus bus) {
         ITEMS.register(bus);

src/main/java/com/jenny/xp2items/items/xpTalisman.java

@@ -7,7 +7,7 @@ import net.minecraft.sounds.SoundEvents;
 import net.minecraft.sounds.SoundSource;
 import net.minecraft.util.Mth;
 import net.minecraft.world.InteractionHand;
-import net.minecraft.world.InteractionResult;
+import net.minecraft.world.InteractionResultHolder;
 import net.minecraft.world.entity.item.ItemEntity;
 import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Item;
@@ -69,7 +69,7 @@ public class xpTalisman extends Item {
     }
 
     @Override
-    public @NotNull InteractionResult use(@NotNull Level level, @NotNull Player player, @NotNull InteractionHand interactionHand) {
+    public InteractionResultHolder<ItemStack> use(@NotNull Level level, @NotNull Player player, @NotNull InteractionHand interactionHand) {
         if (!level.isClientSide) {
             if (ServerConfig.C_XP_AMOUNT.get() > 0) { // xp amount mode
                 spawnItem(level, (ServerPlayer) player);
@@ -79,6 +79,6 @@ public class xpTalisman extends Item {
         } else {
             effects(level, player);
         }
-        return InteractionResult.SUCCESS;
+        return InteractionResultHolder.success(player.getItemInHand(interactionHand));
     }
 }