NullReferenceException: Object reference not set to an instance of an object CameraController.LateUpdate () (at Assets/Scripts/CameraController.cs:17)

Hi everyone,

I am new to Unity and I am trying the "Roll A Ball" Tutorial on the Unity website. I am not able to get the camera to follow the ball.

My CameraController.cs file contains:

 using UnityEngine;
 using System.Collections;
 
 public class CameraController : MonoBehaviour {
 
     public GameObject player;
 
     private Vector3 offset;
 
     void Start ()
     {
         offset = transform.position - player.transform.position;
     }
 
     void LateUpdate ()
     {
            //This line has the error.
         transform.position = player.transform.position + offset;
     }
 }

Also both in my project and the tutorial, the GameObject for the ball is called "Player", whereas the code above defines GameObject player. Do we need to link up player with Player? Sorry if these questions are really basic but I am stuck at this for a while now.

Any help is really appreciated. Thanks for your time. :)

Regards, Faisal