Method does not see the object (NullReferenceException)

Unity Engine
1

I am following some video tutorial, on yt, checked it 3 times and i couldn’t find mistake in my code but anytime i try to press on “item” i get

NullReferenceException: Object reference not set to an instance of an object
ItemSlot.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at Assets/Scripts/ItemSlot.cs:39)
UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:261)
UnityEngine.EventSystems.EventSystem:Update()

and here is also the code:

[CreateAssetMenu]
public class Item : ScriptableObject
{
    public string itemName;
    public Sprite icon;
}

public class ItemSlot : MonoBehaviour, IPointerClickHandler
{
    [SerializeField] public Image image;

    public event Action<Item> OnRightClickEvent;

    private Item _item;
    public Item Item
    {
        get {return _item;}
        set
        {
            _item = value;

            if(_item == null)
            {
                image.enabled = false;
            }
            else
            {
                image.sprite = _item.icon;
                image.enabled = true;
            }
        }
    }

    public void OnPointerClick(PointerEventData eventData)
    {
        if (eventData != null && eventData.button == PointerEventData.InputButton.Right)
        {
            Debug.Log(Item.name);
            if (Item != null && OnRightClickEvent != null)
                OnRightClickEvent(Item);
        }
    }

    protected virtual void OnValidate()
    {
        if(image == null)
        {
            image = GetComponent<Image>();
        }
    }
}

I added whole code in the attachments

5086946–501002–code.txt (4.84 KB)

2

You null reference is on line 39. As you’ve excluded the using lines, I would guess that yourOnRightClickEvent action is null.

3

But why this is null? This accepts “Item” and get’s “Item”, to get to that point it has to exist

4

Maybe it’s the item. Which is line 39?

5 
    public void OnPointerClick(PointerEventData eventData)
    {
        if (eventData != null && eventData.button == PointerEventData.InputButton.Right)
        {
            Debug.Log(Item.name);
            if (Item != null && OnRightClickEvent != null)
                OnRightClickEvent(Item); //that's 39
        }
    }