gridPanel에서 nullreference 오류가 납니다

아래에 같은 질문이 있길래 따라 했는데 유니티랑 C# 둘다 처음이라 그런지 찾기가 너무 어렵네요 ㅜ

여기서만 4시간째 헤메고 있습니다

오류코드는 :

NullReferenceException: Object reference not set to an instance of an object

UI_Inven.Init () (at Assets/Script/UI/scene/UI_Inven.cs:32)

UI_Inven.Start () (at Assets/Script/UI/scene/UI_Inven.cs:14)

 이렇게 나오고

코드는 :

using System.Collections;
using System.Collections.Generic;
using UnityEngine;



public class UI_Inven : UI_Scene
{
    enum GameObjects
    {
        GridPanel
    }



    void Start()
    {
        Init();
    }



    public override void Init()
    {
        base.Init();

        Bind<GameObject>(typeof(GameObjects));

        GameObject gridPanel = Get<GameObject>((int)GameObjects.GridPanel);
        foreach (Transform child in gridPanel.transform)
            Managers.Resource.Destroy(child.gameObject);



  

        for (int i = 0; i < 8; i++)
        {
            GameObject item = Managers.Resource.Instantiate("UI/Scene/UI_Inven_Item");

            item.transform.SetParent(gridPanel.transform);

            
            UI_Inven_Item invenItem = Util.GetOrAddComponent<UI_Inven_Item>(item);

            invenItem.SetInfo($"집행검{i}번");

        }

    }

}

이렇게 짰습니다