How do I get the clicked object.

I'm implementing mlapi in my game and I don't know much about multiplayer. Could someone tell me why I'm in error in this code.
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Erro:
NullReferenceException: Could not get NetworkObject for the NetworkBehaviour. Are you missing a NetworkObject component?
MLAPI.NetworkBehaviour.get_NetworkObject () (at Library/PackageCache/com.unity.multiplayer.mlapi@3e3aef6aa0/Runtime/Core/NetworkBehaviour.cs:282)
MLAPI.NetworkBehaviour.get_IsLocalPlayer () (at Library/PackageCache/com.unity.multiplayer.mlapi@3e3aef6aa0/Runtime/Core/NetworkBehaviour.cs:239)
Target.Update () (at Assets/Componentes/Target/Target.cs:36)
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Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. using MLAPI;
6. using MLAPI.Messaging;
7. using MLAPI.NetworkVariable;
8.  
9. public class Target : NetworkBehaviour
10. {
11.     public CanvasTarget CvTarget;
12.  
13.     public GameObject prefplayer;
14.     public Personagem player;
15.     Vector3 touchPosWorld;
16.     TouchPhase touchPhase = TouchPhase.Ended;
17.     // Start is called before the first frame update
18.     void Start()
19.     {
20.         if (IsLocalPlayer)
21.         {
22.             CvTarget = GetComponent<CanvasTarget>();
23.         }
24.     }
25.  
26.     // Update is called once per frame
27.     void Update()
28.     {
29.         if (prefplayer == null)
30.         {
31.             prefplayer = GameObject.FindGameObjectWithTag("DataBase").GetComponent<GamesObjectsIns>().PrefPerso;
32.             player = prefplayer.GetComponentInParent<Personagem>();
33.         }
34.  
35.         //toutchscreen();
36.         if (IsLocalPlayer)
37.         {
38.             touchMouse();
39.         }
40.  
41.        
42.  
43.     }
44.  
45.  
46.     public void toutchscreen()
47.     {
48.         if (Input.touchCount > 0 && Input.GetTouch(0).phase == touchPhase)
49.         {
50.             touchPosWorld = Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position);
51.  
52.             Vector2 touchPosWorld2D = new Vector2(touchPosWorld.x, touchPosWorld.y);
53.  
54.             RaycastHit2D hitInformation = Physics2D.Raycast(touchPosWorld2D, Camera.main.transform.forward);
55.  
56.             if (hitInformation.collider != null)
57.             {
58.                 GameObject touchedObject = hitInformation.transform.gameObject;
59.                 if (touchedObject.GetComponent<Monstro>())
60.                 {
61.                     CvTarget.GetComponent<CanvasTarget>().setTarget(touchedObject.transform.gameObject);
62.                 }
63.                 else if (touchedObject.GetComponent<Personagem>().ID != player.ID)
64.                 {
65.                     CvTarget.GetComponent<CanvasTarget>().setTarget(touchedObject.transform.gameObject);
66.                 }
67.             }
68.  
69.  
70.         }
71.     }
72.    
73.  
74.     public void touchMouse()
75.     {
76.      
77.  
78.         if (Input.GetMouseButtonDown(0))
79.         {
80.          
81.                 Vector3 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
82.                 Vector2 mousePos2D = new Vector2(mousePos.x, mousePos.y);
83.                 RaycastHit2D hit = Physics2D.Raycast(mousePos2D, Vector2.zero);
84.            
85.          
86.             if (hit.collider != null)
87.             {
88.                 if (hit.collider.GetComponent<Personagem>())
89.                 {
90.                     if (hit.collider.GetComponent<Personagem>().ID != player.ID)
91.                     {
92.                         CvTarget.GetComponent<CanvasTarget>().setTarget(hit.collider.gameObject);
93.  
94.                     }
95.  
96.  
97.  
98.  
99.                 }
100.                 if (hit.collider.GetComponent<Monstro>())
101.                 {
102.                     CvTarget.GetComponent<CanvasTarget>().setTarget(hit.collider.GetComponent<Monstro>().gameObject);
103.                 }
104.  
105.             }
106.         }
107.     }
108.  
109. }
110.  
111.  

 

Probably forgot to add the NetworkObject component to the game object.

 

It stopped giving an error, but I still can't click to select the monster on the screen. Apparently it is not recognizing the click because it does not return anything in Debug.log.