ArrayIsOutOfRange

Hello , I a have been facing this problem recently : (IndexOutofrangeException:array index is out of range ( wrapper stelemref) object:stelemref(object,intptr,object)

My script:

using UnityEngine; using System.Collections; using System;

public class CharacterGenerator : MonoBehaviour { private PlayerCharacter _toon;

 // Use this for initialization
 void Start () {
     _toon = new PlayerCharacter();
     _toon.Awake();
 }
 
 // Update is called once per frame
 void Update () {
 
 }
 
 void OnGUI() {
     GUI.Label(new Rect(10, 10, 50, 25), "Name:");
     _toon.Name = GUI.TextArea(new Rect(65,10,100,25), _toon.Name);
     
     for(int cnt = 0; cnt < Enum.GetValues(typeof(AttributeName)).Length; cnt++) {
         GUI.Label(new Rect(10,40 + (cnt * 25 ), 100,25 ) , ((AttributeName)cnt).ToString());
         GUI.Label(new Rect(115,40 + (cnt * 25 ), 30,25 ) , _toon.GetPrimaryAttribute(cnt).AdjustedBaseValue.ToString());        
 }

Any Help Would Be Appreciated , Ty.