Unassigned Reference Exception error

I am using the Camera2DFollow script and whenever i press play i get a thousand errors saying :

UnassignedReferenceException: The variable target of Camera2DFollow has not been assigned. You probably need to assign the target variable of the Camera2DFollow script in the inspector. UnityEngine.Transform.get_position () (at C:/BuildAgent/work/d63dfc6385190b60/artifacts/EditorGenerated/UnityEngineTransform.cs:28) Camera2DFollow.Update () (at Assets/Sample Assets/2D/Scripts/Camera2DFollow.cs:29)

The Camera2DFollow script is as follows:

 using UnityEngine;
 using System.Collections;
 
 public class Camera2DFollow : MonoBehaviour {
     
     public Transform target;
     public float damping = 1;
     public float lookAheadFactor = 3;
     public float lookAheadReturnSpeed = 0.5f;
     public float lookAheadMoveThreshold = 0.1f;
     
     float offsetZ;
     Vector3 lastTargetPosition;
     Vector3 currentVelocity;
     Vector3 lookAheadPos;
     Vector3 ifDead;
     
     // Use this for initialization
     void Start () {
         lastTargetPosition = target.position;
         offsetZ = (transform.position - target.position).z;
         transform.parent = null;
     }
     
     // Update is called once per frame
     void Update () {
         
         // only update lookahead pos if accelerating or changed direction
         float xMoveDelta = (target.position - lastTargetPosition).x;
 
         bool updateLookAheadTarget = Mathf.Abs(xMoveDelta) > lookAheadMoveThreshold;
 
         if (updateLookAheadTarget) {
             lookAheadPos = lookAheadFactor * Vector3.right * Mathf.Sign(xMoveDelta);
         } else {
             lookAheadPos = Vector3.MoveTowards(lookAheadPos, Vector3.zero, Time.deltaTime * lookAheadReturnSpeed);    
         }
         
         Vector3 aheadTargetPos = target.position + lookAheadPos + Vector3.forward * offsetZ;
         Vector3 newPos = Vector3.SmoothDamp(transform.position, aheadTargetPos, ref currentVelocity, damping);
         
         transform.position = newPos;
         
         lastTargetPosition = target.position;    
     }
 }

Don't know why I am getting this error. Everything still works but the errors are annoying. Any help would be appreciated.