The object of type 'Transform' has been destroyed but you are still trying to access it

Questions & Answers
1

when my player object destroy this error happen, any help?

 using System.Collections;
    using System.Collections.Generic;
    using UnityEngine;
    
    public class Player_move : MonoBehaviour
    {
        [SerializeField]
        float player_speed = 1;
    
        [SerializeField]
        float player_jump = 1;
    
        public int playerhealth = 3;
    
        bool isjump;
        Rigidbody2D rb;
        SpriteRenderer sr;
        Animator ar;
    
    
       
        void Start()
        {
            rb = GetComponent<Rigidbody2D>();
            sr = GetComponent<SpriteRenderer>();
            ar = GetComponent<Animator>();
        }
    
    
        void Update()
        {
            if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
            {
                ar.Play("player run");
                sr.flipX = true;
            }
            else if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
            {
                ar.Play("player run");
                sr.flipX = false;
            }
           
    
            if (Input.GetButtonDown("Jump") && isjump == false)
            {
                ar.Play("player jump");
                rb.velocity = new Vector2(0, player_jump);
                isjump = true;
            }
    
            if(Mathf.Abs(rb.velocity.y) < 0.01f)    
            {
                isjump = false;
            }
    
          
        }
           private void FixedUpdate()
        {
            rb.velocity = new Vector2(player_speed * Input.GetAxis("Horizontal") , rb.velocity.y);
            
        }
    
        private void OnTriggerEnter2D(Collider2D collision)
        {
            if (collision.CompareTag("Enemy") || collision.CompareTag("Enemy_2") || collision.CompareTag("Enemy_3"))
            {
    
                playerhealth--;
                Debug.Log(playerhealth);
                ar.Play("player wawa");
            }
            if(playerhealth == 0)
            {
                Destroy(gameObject);
            }
        }
    }
2

U should add here a GameObject to your script and Destroy this. this here should work

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player_Move : MonoBehaviour
{
    [SerializeField]
    float player_speed = 1;

    [SerializeField]
    float player_jump = 1;

    public int playerhealth = 3;

    bool isjump;
    Rigidbody2D rb;
    SpriteRenderer sr;
    Animator ar;

    public GameObject player;



    void Start()
    {
        rb = player.GetComponent(typeof (Rigidbody2D)) as Rigidbody2D;
        sr = player.GetComponent(typeof (SpriteRenderer)) as SpriteRenderer;
        ar = player.GetComponent(typeof(Animator)) as Animator;
    }


    void Update()
    {
        if (Input.GetKey(KeyCode.A) || Input.GetKey(KeyCode.LeftArrow))
        {
            ar.Play("player run");
            sr.flipX = true;
        }
        else if (Input.GetKey(KeyCode.D) || Input.GetKey(KeyCode.RightArrow))
        {
            ar.Play("player run");
            sr.flipX = false;
        }


        if (Input.GetButtonDown("Jump") && isjump == false)
        {
            ar.Play("player jump");
            rb.velocity = new Vector2(0, player_jump);
            isjump = true;
        }

        if (Mathf.Abs(rb.velocity.y) < 0.01f)
        {
            isjump = false;
        }


    }
    private void FixedUpdate()
    {
        rb.velocity = new Vector2(player_speed * Input.GetAxis("Horizontal"), rb.velocity.y);

    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.CompareTag("Enemy") || collision.CompareTag("Enemy_2") || collision.CompareTag("Enemy_3"))
        {

            playerhealth--;
            Debug.Log(playerhealth);
        }
        if (playerhealth == 0)
        {
            Destroy(player);
        }
    }
}