Image' does not contain a definition for 'Sprite' Help please

1

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro;
using UnityEngine.UI;

public class DisplayInventory : MonoBehaviour
{

public GameObject inventoryPrefab;
public InventoryObject inventory;
public int X_START;
public int Y_START;
public int X_SPACE_BETWEEN_ITEM;
public int NUMBER_OF_COLUMNS;
public int Y_SPACE_BETWEEN_ITEM;
Dictionary<InventorySlot, GameObject> itemsDisplayed = new Dictionary<InventorySlot, GameObject>();
void Start()
{
    CreateDisplay();
}
void Update()
{
    UpdateDisplay();
}
public void UpdateDisplay()
{
    for (int i = 0; i < inventory.Container.Items.Count; i++)
    {
        InventorySlot slot = inventory.Container.Items[i];
        if(itemsDisplayed.ContainsKey(slot))
        {
            itemsDisplayed[slot].GetComponentInChildren<TextMeshProUGUI>().text = slot.amount.ToString("n0");
        }
        else
        {
            var obj = Instantiate(inventoryPrefab, Vector3.zero, Quaternion.identity, transform);
            obj.transform.GetChild(0).GetComponentInChildren<Image>().Sprite = inventory.database.GetItem[slot.item.Id].uiDisplay;
            obj.GetComponent<RectTransform>().localPosition = GetPosition(i);
            obj.GetComponentInChildren<TextMeshProUGUI>().text = slot.amount.ToString("n0");
            itemsDisplayed.Add(slot, obj);
        }

    }


}


public void CreateDisplay()
{
    
    for (int i = 0; i < inventory.Container.Items.Count; i++)
    {
        InventorySlot slot = inventory.Container.Items[i];

        var obj = Instantiate(inventoryPrefab, Vector3.zero, Quaternion.identity, transform);
        obj.transform.GetChild(0).GetComponentInChildren<Image>().Sprite = inventory.database.GetItem[slot.item.Id].uiDisplay;
        obj.GetComponent<RectTransform>().localPosition = GetPosition(i);
        obj.GetComponentInChildren<TextMeshProUGUI>().text = slot.amount.ToString("n0");
        itemsDisplayed.Add(slot, obj);
    }
}
public Vector3 GetPosition(int i)
{
    return new Vector3(X_START + (X_SPACE_BETWEEN_ITEM * (i % NUMBER_OF_COLUMNS)),Y_START + (-Y_SPACE_BETWEEN_ITEM * (i / NUMBER_OF_COLUMNS)), 0f);
}