Unity + C # problem

using UnityEngine;
using DG.Tweening;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
public class PlayerMow : MonoBehaviour
{
// public GameManager gm;
public Rigidbody rb;

public float runSpeed = 5500.0f;
public float strafeSpeed = 500f;
public float jumpForce = 15f;
public New nw;

public GameObject lol;




protected bool strafeLeft = false;
protected bool strafeRight = false;
protected bool doJump = false;


// bool lol = false;


// void start(){

// }





public void Start() {
lol.SetActive(false);
// Console.Log("123123");

}


void FixedUpdate()
{


// rb.AddForce(0, 0, runSpeed * Time.deltaTime); //Time.deltaTime runSpeed =
rb.MovePosition(transform.position + Vector3.forward * runSpeed * Time.deltaTime);

if(strafeLeft) {
rb.AddForce(strafeSpeed * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
}
if (strafeRight)
{
rb.AddForce(-strafeSpeed * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
}

if(doJump){
rb.AddForce(Vector3.up * jumpForce, ForceMode.Impulse);
transform.DORewind();
transform.DOShakeScale(.5f, .5f, 3, 30);
doJump = false;
}
}








void Update()
{


if(transform.position.z < -42.60){
// lol = GameObject.Find ("Test_Button");
// lol.gameObject.SetActive(false);
// lol.SetActive(false);
lol.SetActive(true);
}


if(transform.position.y < -5f){
// SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
lol.SetActive(true);
// lol.SetActive(false);
}




if(Input.GetKey("d")) {
strafeLeft = true;
} else{
strafeLeft = false;
}



if(Input.GetKey("a")) {
strafeRight = true;
} else{
strafeRight = false;
}



if(Input.GetKey("space")) {
doJump = true;
}



}






void OnCollisionEnter(Collision collision)
{

if(collision.collider.tag == "Obstacle") {

// lol = GameObject.Find ("Test_Button");
// lol.gameObject.SetAvtive(true);
// lol.gameObject.SetActive(true);

// SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
}

}














}

Code

using UnityEngine;

using DG.Tweening;

using UnityEngine.UI;

using UnityEngine.SceneManagement;

public class PlayerMow : MonoBehaviour

{  

    // public GameManager gm;

    public Rigidbody rb;



    public float runSpeed = 5500.0f;

    public float strafeSpeed = 500f;

    public float jumpForce = 15f;

    public New nw;



    public GameObject lol;

   







    protected bool strafeLeft = false;

    protected bool strafeRight = false;

    protected bool doJump = false;

   



    // bool lol = false;





    // void start(){

       

    // }





   





    public void Start() {

        lol.SetActive(false);

        // Console.Log("123123");



    }





    void FixedUpdate()

    {  





        // rb.AddForce(0, 0, runSpeed * Time.deltaTime); //Time.deltaTime runSpeed =

        rb.MovePosition(transform.position + Vector3.forward * runSpeed * Time.deltaTime);



        if(strafeLeft) {

            rb.AddForce(strafeSpeed * Time.deltaTime, 0, 0, ForceMode.VelocityChange);

        }

        if (strafeRight)

        {

            rb.AddForce(-strafeSpeed * Time.deltaTime, 0, 0, ForceMode.VelocityChange);

        }



        if(doJump){

            rb.AddForce(Vector3.up * jumpForce, ForceMode.Impulse);

            transform.DORewind();

            transform.DOShakeScale(.5f, .5f, 3, 30);

            doJump = false;

        }

    }

















    void Update()

    {

       



        if(transform.position.z < -42.60){

            // lol = GameObject.Find ("Test_Button");

            // lol.gameObject.SetActive(false);

            // lol.SetActive(false);

            lol.SetActive(true);

        }





        if(transform.position.y < -5f){

            // SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);

            lol.SetActive(true);

            // lol.SetActive(false);

        }









        if(Input.GetKey("d")) {

            strafeLeft = true;

        } else{

            strafeLeft = false;

        }  







        if(Input.GetKey("a")) {

            strafeRight = true;

        } else{

            strafeRight = false;

        }  







        if(Input.GetKey("space")) {

            doJump = true;

        }





       

    }

   











    void OnCollisionEnter(Collision collision)

    {



        if(collision.collider.tag == "Obstacle") {

           

            // lol = GameObject.Find ("Test_Button");

            // lol.gameObject.SetAvtive(true);

            // lol.gameObject.SetActive(true);

           

            // SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);

        }



    }

   





       



               



   











   

}

суть в том что когда куб упадет или столкнётся то, появится кнопка
Но при появлении у меня вылазеет ерор

Ошибка

UnassignedReferenceException: The variable lol of PlayerMow has not been assigned.
You probably need to assign the lol variable of the PlayerMow script in the inspector.
PlayerMow.Update () (at Assets/PlayerMow.cs:87)

Вот начало игры:


вот когда падаю за границу:

сижу и не могу понять в чем дело, гуглил переводил, пишет мол нету такого объекта lol, help