Changing a weapon gun into sword guy

hey hi all i wanted to change the guy in survival shooter into a girl who has sword but my code is not working since it gives error MissingComponentException: There is no 'LineRenderer' attached to the "Player" game object, but a script is trying to access it. You probably need to add a LineRenderer to the game object "Player". Or your script needs to check if the component is attached before using it. Player Shooting. Disable Effects () (at Assets/Scripts/Scripts/Player/Player Shooting.cs:49) PlayerShooting.Update () (at Assets/Scripts/Scripts/Player/PlayerShooting.cs:42) here is my code for player shooting using UnityEngine;

public class PlayerShooting : MonoBehaviour { public int damagePerShot = 20; public float timeBetweenBullets = 0.15f; public float range = 100f;

 float timer;
 Ray shootRay = new Ray();
 RaycastHit shootHit;
 int shootableMask;
 ParticleSystem gunParticles;
 LineRenderer gunLine;
 AudioSource gunAudio;
 Light gunLight;
 float effectsDisplayTime = 0.2f;


 void Awake ()
 {
     shootableMask = LayerMask.GetMask ("Shootable");
     gunParticles = GetComponent<ParticleSystem> ();
     gunLine = GetComponent <LineRenderer> ();
     gunAudio = GetComponent<AudioSource> ();
     gunLight = GetComponent<Light> ();
 }


 void Update ()
 {
     timer += Time.deltaTime;

     if(Input.GetButton ("Fire1") && timer >= timeBetweenBullets && Time.timeScale != 0)
     {
         Shoot ();
     }

     if(timer >= timeBetweenBullets * effectsDisplayTime)
     {
         DisableEffects ();
     }
 }


 public void DisableEffects ()
 {
     gunLine.enabled = false;
     gunLight.enabled = false;
 }


 void Shoot ()
 {
     timer = 0f;

     gunAudio.Play ();

     gunLight.enabled = true;

     gunParticles.Stop ();
     gunParticles.Play ();

     gunLine.enabled = true;
     gunLine.startWidth = 0.02f;
     gunLine.SetPosition (0, transform.position);

     shootRay.origin = transform.position;
     shootRay.direction = transform.forward;

     if(Physics.Raycast (shootRay, out shootHit, range, shootableMask))
     {
         EnemyHealth enemyHealth = shootHit.collider.GetComponent <EnemyHealth> ();
         if(enemyHealth != null)
         {
             enemyHealth.TakeDamage (damagePerShot, shootHit.point);
         }
         gunLine.SetPosition (1, shootHit.point);
     }
     else
     {
         gunLine.SetPosition (1, shootRay.origin + shootRay.direction * range);
     }
 }

}