1 display no cameras rendering

please help me i wanted to create cameras

here is my code:

Code (CSharp):

1. public class UIController : MonoBehaviour
2. {
3.     public GameObject Tablet;
4.     public GameObject[] Cameras;
5.     public GameObject Camera;
6.     private int currentIndex = 0;
7.    
8.  
9.     public void TabletChangeVisible()
10.     {
11.         if (Tablet.activeSelf)
12.         {
13.             Tablet.SetActive(false);
14.             Cameras[currentIndex].SetActive(false);
15.             Camera.SetActive(true);
16.         }
17.         else
18.         {
19.             Tablet.SetActive(true);
20.             Camera.SetActive(false);
21.             Cameras[currentIndex].SetActive(true);
22.         }
23.         void changeCamera(int index)
24.         {
25.             Cameras[currentIndex].SetActive(false);
26.             currentIndex = index;
27.             Cameras[currentIndex].SetActive(true);
28.         }
29.     }
30.     // Start is called before the first frame update
31.     void Start()
32.     {
33.        
34.     }
35.  
36.     // Update is called once per frame
37.     void Update()
38.     {
39.        
40.     }
41. }

that i can switch on ui buttons