LineRenderer

I am making a game but thre is a problem with my line renderer here is the code. The problem is that on line 48 of playermove script it says there is no object reference

PowerLine Script

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

public class PowerLine : MonoBehaviour
{
    // public

    public LineRenderer lr;

    // void

    void Awake()
    {
        lr = GetComponent<LineRenderer>();
    }

    public void RenderLine(Vector3 startPoint, Vector3 endPoint)
    {
        lr.positionCount = 2;
        Vector3[] Linepoints = new Vector3[2];
        Linepoints[0] = startPoint;
        Linepoints[1] = endPoint;

        lr.SetPositions(Linepoints);
    }

    public void EndLine()
    {
        lr.positionCount = 0;
    }

}

playermove script

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

public class Player : MonoBehaviour
{
    // public

    public float power = 10f;

    public Rigidbody2D rb;

    public Vector2 minPower;
    public Vector2 maxPower;

    PowerLine pl;

    // private

    Camera cam;

    Vector2 force;

    Vector3 startPoint;
    Vector3 endPoint;

    // void

    void Start()
    {
        cam = Camera.main;
        pl = GetComponent<PowerLine>();
    }

    void Update()
    {
        if (Input.simulateMouseWithTouches)
        {
            startPoint = cam.ScreenToWorldPoint(Input.mousePosition);
            startPoint.z = 15;  
        }

        if (Input.simulateMouseWithTouches)
        {
            Vector3 currentPoint = cam.ScreenToWorldPoint(Input.mousePosition);
            currentPoint.z = 15;
          
            pl.RenderLine(startPoint, currentPoint);
        }

        if (Input.simulateMouseWithTouches)
        {
            endPoint = cam.ScreenToWorldPoint(Input.mousePosition);
            endPoint.z = 15;

            force = new Vector2(Mathf.Clamp(startPoint.x - endPoint.x, minPower.x, maxPower.x), Mathf.Clamp(startPoint.y - endPoint.y, minPower.y, maxPower.y));
            rb.AddForce(force * power, ForceMode2D.Impulse);
            pl.EndLine();
        }
    }

}

Can you paste the whole error so we can see the origin of the error? Have you added the Power Line script to the player? Stupid question, I know, but sometimes it is the simple things…