NullReferenceException: Object reference not set to an instance of an object

Hi I'm kinda new to Unity and I have followed some tutorial on the Internet and I just want to be able to pick up the cutlery available in my game. This maybe the most mainstream question but I really need some help here because I don't know where or what to fix

Here's my script named InteractScript

 using UnityEngine;
 using System.Collections;
 
 public class InteractScript : MonoBehaviour {
     public float range;
     public float interactDistance = 5f;
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () 
     {
         if(Input.GetKeyDown(KeyCode.Mouse0))
         {
             Ray ray = new Ray(transform.position,transform.forward);
             RaycastHit hit;
             if(Physics.Raycast(ray,out hit,interactDistance))
             {
                 if(hit.collider.CompareTag("Door"))
                 {
                     hit.collider.transform.parent.GetComponent<doorscript>().ChangeDoorState();
                 }
                 if(hit.collider.CompareTag("BigDoor"))
                 {
                     hit.collider.transform.GetComponent<BigDoor>().ChangeDoorState();
                 }
                 if(hit.collider.CompareTag("Oven"))
                 {
                     hit.collider.transform.GetComponent<Oven>().ChangeDoorState();
                 }
                 if(hit.collider.CompareTag("SlidingDoor"))
                 {
                     hit.collider.GetComponent<Animation>().Play();
                 }
                 if(hit.collider.CompareTag("Cutlery"))
                 {
                     hit.collider.GetComponent<Cutlery>().ChangeCutleryState();
                 }
             }
         }
     }
 }

When I try to click on my cutlery, this shows up

NullReferenceException: Object reference not set to an instance of an object InteractScript.Update () (at Assets/Script/InteractScript.cs:39)

It says on line 39 but I don't see it

Any help will be appreciated