Question NullReferenceException: Object reference not set to an instance of an object skor.Update

Hi so ive had an assignment this day. I'm supposed to make a simple game with unity. I am know in steps for making score board. but everytime I try to play it. there's error that said:

NullReferenceException: Object reference not set to an instance of an object
skor.Update () (at Assets/Script/skor.cs:17)

This is the script I used.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class skor : MonoBehaviour
7. {
8.     // Start is called before the first frame update
9.     void Start()
10.     {
11.         PlayerPrefs.SetInt ("skor", 0);
12.     }
13.  
14.     // Update is called once per frame
15.     void Update()
16.     {
17.         GetComponent<Text> ().text = PlayerPrefs.GetInt ("skor").ToString();
18.     }
19. }
20.  

is there any ideas how to fix it?

 

and btw this is the unity tab