Why are objects disapearing?

Scripting
1

This script worked perfect…then I ran a build to test…then tried to add and remove certain objects now players disapear on start…

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;

public class PlayerSelection : MonoBehaviour {


    private GameObject[] Players;
    int index;

    void Start()
    {
        index = PlayerPrefs.GetInt ("playerselect");

        Players = new GameObject[transform.childCount];
        //
        for (int i = 0; i < transform.childCount; i++) 
            Players [i] = transform.GetChild (i).gameObject; 
       
        //
        foreach (GameObject go in Players) 
        go.SetActive (false);
       

        if (Players [index])
           
        Players [index].SetActive (true);
    }


    public void ToggleLeft ()
    {
        Players[index].SetActive (false);

        index--;
        if (index < 0)
           
        index = Players.Length - 1;
   

        Players [index].SetActive (true);
    }
    public void ToggleRight ()
    {
        Players [index].SetActive (false);

        index++;
        if (index < 0) 
        index = Players.Length - 1;
       
        Players [index].SetActive (true);
    }

    public void Select()
    {
        PlayerPrefs.SetInt ("playerselect", index);
        SceneManager.LoadScene("Shooter");

    }
}
2

With this script attached to a different project the left works fine… If right, it isn’t returning. It’s setting all off and will not return

3

Shouldn’t this:

public void ToggleRight ()
    {
        Players [index].SetActive (false);
        index++;
        if (index < 0)
        index = Players.Length - 1;
      
        Players [index].SetActive (true);
    }

Be checking the other direction:

public void ToggleRight ()
    {
        Players [index].SetActive (false);
        index++;
        if (index  == Player.Length))
            index = 0;
      
        Players [index].SetActive (true);
    }