Assets\Enemy.cs(19,10): error CS0246: The type or namespace name 'Player' could not be found (are you missing a using di

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class Enemy : MonoBehaviour
{
 private float timeBtwAttack;
 public float startTimeBtwAttack;
 
 public int health;
 public float speed;
 public GameObject deathEffect;
 public int damage;
 private float stopTime;
 public float startStopTime;
 public float normalSpeed;
 private Player player;
 private Animator anim;
 
 private void Start()
 {
     anim = GetComponent<Animator>();
     player = FindObjectOfType<Player>();
     normalSpeed = speed;
 }
 
private void Update()
{
    if(stopTime <= 0)
    {
        speed = normalSpeed;
    }
    else
        {
       speed = 0;
       stopTime -= TimedeltaTime;
        }
    if(health <= 0)
    {
        Destroy(gameObject);
    }
    transform.Translate(Vector2.left * speed * Time.deltaTime);
}
 public void TakeDamage(int damage)
 {
     stopTime = startStopTime;
     Instantiate(deathEffect, transform.position, Quaternion.identity);
     health -= damage;
 }
 public void OnTriggerStay2D(Collider2D other)
 {
    if(other.CompareTag("Player"))
    {
        if(timeBtwAttack <=0)
        {
        anim.SetTrigger("attack");
    }
    else 
    {
        timeBtwAttack -= Time.deltaTime;
    }
 }
}
public void OnEnemyAttack()
{
    Instantiate(deathEffect, player.transform.position, Quaternion.identity);
    player.health -= damage;
    timeBtwAttack = startTimeBtwAttack;
}
}