Object reference not set to an instance of an object

Hello I need help for this piece of code for a mate can anyone help for line 17 it’s spamming the same error over and over again in console

using UnityEngine;

public class Enemy : MonoBehaviour{

    public float speed = 10f;

    private Transform target;
    private int wavepointIndex = 0;

    void start()
    {
        target = Waypoints.points[0];
    }

    void Update()
    {
        Vector3 dir = target.position - transform.position;
        transform.Translate(dir.normalized * speed * Time.deltaTime, Space.World);

        if (Vector3.Distance(transform.position, target.position) <= 0.2f)
        {
            GetNextWaypoint();
        }
    }

    void GetNextWaypoint()
    {
        if (wavepointIndex >= Waypoints.points.Length - 1)
        {
            Destroy(gameObject);
            return;
        }

        wavepointIndex++;
        target = Waypoints.points[wavepointIndex];
    }
}

Line 17 is empty, please update the code or say what the correct line is. ( Sorry that this is a awnser but I can’t comment).

Edit: If the problem is on line 15, its because Waypoints.points[0] is a prefab, there are 2 solutions:

**1.**Change it to a scene object.
**2.**Instantiate a copy of that prefab to the scene. Like this:

target=Instantiate(Waypoints.points[0]);

Instead of:

target=Waypoints.points[0];