SpigotCore_14/src/de/steamwar/inventory/SWItem_14.java

@@ -8,7 +8,11 @@ class SWItem_14 {
     private SWItem_14(){}
 
     static Material getMaterial(String material) {
-        return Material.valueOf("LEGACY_" + material);
+        try{
+            return Material.valueOf(material);
+        }catch(IllegalArgumentException e){
+            return Material.valueOf("LEGACY_" + material);
+        }
     }
 
     static Material getDye(int colorCode){