"Look rotation viewing vector is zero"

I don't know why but my debug log is filled with this message. Here is my player movement. My character also keeps automatically being reset to a default position and I can't remember what I did to cause it.

Code (CSharp):

1.     void Start()
2.     {
3.         forward = Camera.main.transform.forward;
4.         forward.y = 0;
5.         right = Quaternion.Euler(new Vector3(0, 90, 0)) * forward;
6.         detected = GetComponent<WallLighting>();
7.     }
8.  
9.     void Update()
10.     {
11.         Move();
12.      
13.         if (detected)
14.         {
15.             Debug.Log("detected");
16.             if (Input.GetKeyDown("e"))
17.             {
18.                 hasFlashlight = false;
19.                 flashlightInsert = true;
20.                 DestroyGameObject();
21.             }
22.         }
23.     }
24.  
25.     void Move()
26.     {
27.         Vector3 direction = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis ("Vertical")); //takes horizontal/vertical button inputs and translates it to movement
28.         Vector3 rightMovement = right * moveSpeed * Time.deltaTime * Input.GetAxis("Horizontal");
29.         Vector3 upMovement = forward * moveSpeed * Time.deltaTime * Input.GetAxis("Vertical");
30.  
31.         Vector3 heading = (rightMovement + upMovement);
32.  
33.         transform.forward = heading;
34.         transform.position += rightMovement;
35.         transform.position += upMovement;
36.     }