Line renderer not visible in game

I can't see my line in game, I am trying to draw it between two game objects but you just can't see it. https://gyazo.com/d19c03dcf9b1ced5256f3b2aae2dd67a (Also this is a 2D game)

Yes the line renderer is disabled but it gets enabled in game when I press E. When I set the positions of the line renderer this is what I do:

 void Update() {
     if (joint.distance > 1f) {
         joint.distance -= step;
     } else {
         joint.enabled = false;
         grapple.enabled = false;
     }
 
     if (Input.GetKeyDown(KeyCode.E)) {
         targetPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
         targetPos.z = 0;
 
         hit = Physics2D.Raycast(transform.position, targetPos - transform.position, distance, groundLayer);
         Debug.DrawRay(transform.position, targetPos - transform.position, Color.red);
 
         if (hit.collider != null && hit.collider.gameObject.GetComponent<Rigidbody2D>() != null) {
             joint.enabled = true;
             joint.connectedBody = hit.collider.gameObject.GetComponent<Rigidbody2D>();
             joint.connectedAnchor = hit.point - new Vector2(hit.collider.transform.position.x, hit.collider.transform.position.y);
             joint.distance = Vector2.Distance(transform.position, hit.point);
 
             grapple.enabled = true;
             grapple.SetPosition(0, transform.position);
             grapple.SetPosition(1, hit.point);
         }
     }
 
     if (Input.GetKey(KeyCode.E)) {
         grapple.SetPosition(0, transform.position);
     }
 
     if (Input.GetKeyUp(KeyCode.E)) {
         joint.enabled = false;
         grapple.enabled = false;
     }
 }

Any ideas?