FreeLook Camera not working with multiplayer

Hi,
I am working on a multiplayer game with Photon. It is working good but I am not satisfied by the camera. Now I am using a simple way (using photonView) to detect if I am the player and, in this case, move the camera to an abstract point behind the character (it is like a 3d person camera).
Now, I want to switch to the Cinemachine using the FreeLook Camera but the results are bad.

I have all the player prefabs in my resource folder. When the game start, a casual avatar is selected and a new player is attached to the scene.
The player is created in the PlayerSpawner script

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Photon.Pun;
5.  
6. public class PlayerSpawner : MonoBehaviour
7. {
8.  
9.   public static PlayerSpawner instance;
10.  
11.   private void Awake() {
12.     instance = this;
13.   }
14.  
15.   public GameObject playerPrefab;
16.   public GameObject player;
17.  
18.     // Start is called before the first frame update
19.     void Start()
20.     {
21.         if(PhotonNetwork.IsConnected) {
22.           SpawnPlayer();
23.         }
24.     }
25.  
26.     public void SpawnPlayer() {
27.       Transform spawnPoint = SpawnManager.instance.GetSpawnPoint();
28.  
29.       player = PhotonNetwork.Instantiate(playerPrefab.name, spawnPoint.position, spawnPoint.rotation);
30.     }
31. }
32.  

Then I control the character in the PlayerController script. In this script I originally implemented the camera transformation (not the Cinemachine) and now I am trying to manage also the FreeLook camera to attach it to the player.
Basically, this is the process I make.

Code (CSharp):

1.  
2. public GameObject playerModel;
3. private CinemachineFreeLook freeLookCam;
4. void Start()
5.     {
6.       // Cursor.lockState = CursorLockMode.Locked;
7.       var freeLookCam = GetComponent<CinemachineFreeLook>();
8.      
9.       playerModel.GetComponent<Renderer>().material = allSkins[photonView.Owner.ActorNumber % allSkins.Length];
10.       setupCamera();
11.     }
12.  
13.     void setupCamera() {
14.       freeLookCam.Follow = playerModel.transform;
15.       freeLookCam.LookAt = playerModel.transform;
16.     }

When it runs, I get the following error
NullReferenceException: Object reference not set to an instance of an object
PlayerController.setupCamera () (at Assets/Scripts/PlayerController.cs:65)
PlayerController.Start () (at Assets/Scripts/PlayerController.cs:59)

which is related to this line freeLookCam.Follow = playerModel.transform;


The FreeLook camera is inside the main Scene. I cannot directly attach the player to the follow and lookat because the player is created by the PlayerSpawner. If I run the game and then attach manually the created player to follow and lookat, it seems to work (even if I do not know what happens when a new player joins the game)

Thank you for your help