Bug NullReferenceException: Object reference not set to an instance of an object PlayerController.FixedU

Hello,

So I am following the tutorial for lesson 6.2 on unity learn. My scripts have been exactly the same as the one that is shown in the tutorial except that my one does not work. The console window keeps telling me: "
NullReferenceException: Object reference not set to an instance of an object
PlayerController.FixedUpdate () (at Assets/Scripts/PlayerController.cs:30)". And I have no clue where I went wrong. Please help me!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PlayerController : MonoBehaviour
6. {
7.     // Private variables
8.     // [SerializeField] private float speed = 10.0f;
9.     [SerializeField] private float horsePower = 0;
10.     private float turnSpeed = 50.0f;
11.     private float horizontalInput;
12.     private float verticalInput;
13.  
14.     private Rigidbody playerRb;
15.  
16.     void Start()
17.     {
18.         playerRb.GetComponent<Rigidbody>();
19.     }
20.  
21.     // Update is called once per frame
22.     void FixedUpdate()
23.     {
24.         // Player inputs
25.         horizontalInput = Input.GetAxis("Horizontal");
26.         verticalInput = Input.GetAxis("Vertical");
27.  
28.         // We move the vehicle forward
29.         //transform.Translate(Vector3.forward * Time.deltaTime * speed * forwardInput);
30.         playerRb.AddRelativeForce(Vector3.forward * horsePower * verticalInput);
31.  
32.         // Turning the vehicle
33.         transform.Rotate(Vector3.up, Time.deltaTime * turnSpeed * horizontalInput);
34.  
35.     }
36. }
37.  

 

Code (CSharp):

1. playerRb.GetComponent<Rigidbody>();

you copied this code wrong, it should be

Code (CSharp):

1. playerRb = GetComponent<Rigidbody>();

 

there is a rigidbody attached.

 

Sorry check my post again, I edited it.

 

Again, please reread my earlier post - your code is wrong.

 

Thank you I see. Thank you so much