Raycast not working on touchscreen (Android tablet/phone)

I have a raycast that works in the unity editor but not when I build it for Android( tablet or phone, neither work). The code I'm using is as follows:

 public class DirectionalTilePlacing : MonoBehaviour {

 public LayerMask levelLayer;
 private int tileType;
 public int Tiletype
     {
         get { return tileType; }
     set
     {
         tileType = value;
     }
     }
 RaycastHit hit;
 Vector2I placePosition;
 // Update is called once per frame
 void Update()
 {
     Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
     if (Physics.Raycast(ray, out hit, Mathf.Infinity, levelLayer))
     {
         if (hit.collider.tag == "Replaceable")
         {
                 
             transform.position = new Vector3(Mathf.Floor(hit.point.x) + 0.5f, Mathf.Floor(hit.point.y), Mathf.Floor(hit.point.z) + 0.5f);
             GetComponent<MeshRenderer>().enabled = true;
         }
     }
     if (Input.GetMouseButtonUp(0))
     {
         ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if (Physics.Raycast(ray, out hit, Mathf.Infinity, levelLayer))
             if (hit.collider.tag == "Replaceable")
             {
                 placePosition = new Vector2I((int)transform.position.x, (int)transform.position.z);
                 EditorManager.map.SetEmpty(placePosition);
                 EditorManager.map.BrushTile(EditorManager.map.TypeToObject((Tile.tileType)tileType), placePosition, (Tile.tileType)tileType);
                 GetComponent<MeshRenderer>().enabled = false;
                 gameObject.SetActive(false);
             }
     }

 }

}

Everything up until any Physics.Raycast line works. The idea is that there is a ray casted from the position your finger is at when touching the screen.