The type or namespace name 'Player' could not be found, how can i fix it?

I am making a Top-down 2D shooter for a game jam that i'm participating, but when i did the Enemy script for it to damage the player, i got this error : The type or namespace name 'Player' could not be found (are you missing a using directive or an assembly reference?) Here is the line of code that i'm having problems with:

Line 9

Code (CSharp):

1.     private Player player;
2.  

Line 13

Code (CSharp):

1.  player = GameObject.FindGameObjectWithTag("Player").GetComponent<Player>();

And here is the full script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Enemy : MonoBehaviour
6. {
7.     public float speed;
8.     private Transform playerPos;
9.     private Player player;
10.  
11.     void Start()
12.     {
13.         player = GameObject.FindGameObjectWithTag("Player").GetComponent<Player>();
14.         playerPos = GameObject.FindGameObjectWithTag("Player").transform;
15.     }
16.  
17.     // Update is called once per frame
18.     void Update()
19.     {
20.         transform.position = Vector2.MoveTowards(transform.position, playerPos.position, speed * Time.deltaTime);
21.     }
22.  
23.     void OnTriggerEnter2D(Collider2D other)
24.     {
25.         if(other.CompareTag("Player"))
26.         {
27.             player.health--;
28.             Destroy(gameObject);
29.         }
30.         if(other.CompareTag("Projectile"))
31.         {
32.             Destroy(gameObject);
33.         }
34.     }
35. }
36.  

 

What is 'Player'?
Do you have an Component/script called Player.cs in your scene?
If it's a component in your scene, try using

GameObject player;

 

Create a New Script and Add paste the code below:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Player : MonoBehaviour
6. {
7.     // Start is called before the first frame update
8.     public float speed;
9.     private Rigidbody2D rigidbody;
10.    
11.     void Start()
12.     {
13.         rigidbody = GetComponent<Rigidbody2D>();
14.     }
15.  
16.     // Update is called once per frame
17.     void Update()
18.     {
19.         rigidbody.velocity = new Vector2(speed, rigidbody.velocity.y);
20.     }
21. }
22.