更新

src/main/java/me/skymc/taboolib/anvil/AnvilContainer.java

@@ -1,8 +1,6 @@
 package me.skymc.taboolib.anvil;
 
-import com.ilummc.tlib.util.asm.AsmClassTransformer;
 import me.skymc.taboolib.nms.NMSUtils;
-import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
 /**

src/main/java/me/skymc/taboolib/anvil/AnvilContainerAPI.java

@@ -46,7 +46,7 @@ public class AnvilContainerAPI implements Listener {
         meta.setDisplayName(str);
         item.setItemMeta(meta);
 
-        p.getOpenInventory().setItem(0, item);
+        p.getOpenInventory().getTopInventory().setItem(0, item);
         p.playSound(p.getLocation(), Sound.BLOCK_ANVIL_PLACE, 1, 1);
     }