Disguise option parameter ItemStack[] cannot be a null parameter

src/main/java/me/libraryaddict/disguise/utilities/parser/params/types/custom/ParamInfoItemStackArray.java

@@ -14,6 +14,11 @@ public class ParamInfoItemStackArray extends ParamInfoItemStack {
         super(paramClass, name, valueType, description, possibleValues);
     }
 
+    @Override
+    public boolean canReturnNull() {
+        return false;
+    }
+
     @Override
     public Set<String> getEnums(String tabComplete) {
         String beginning = tabComplete.substring(0, tabComplete.contains(",") ? tabComplete.lastIndexOf(",") + 1 : 0);