滚动切换式选关脚本报错，UnityException：Transform child of bounds，如何解决？(语言-c#)

Question

问题遇到的现象和发生背景

这是一个滑动式选关的脚本，修改前可以正常运行，我想把这个做更改，后悔了，在撤销更改后运行就报错了

问题相关代码

using UnityEngine;
using UnityEngine.UI;

namespace MaxIceFlameTemplate.UI
{
public class MenuSettings : MonoBehaviour
{
public Text NameText;
public Text DiamondText, PercentageText;
public LRButton LeftButton, RightButton;
public GameObject LevelModelHolder;
public LevelInformation[] LevelInfos;

    [HideInInspector] public Vector3 LV3Next, LV3Last;
    [HideInInspector] public static int NowLevelId = 0;
    [HideInInspector] public string SceneName;
    [HideInInspector] public int NowPer, NowDia, NowCro;
    [HideInInspector] public int NowRecordId;
    [HideInInspector] public UnityEngine.Camera MainCamera;
    [HideInInspector] public PlayLevel PlayButton;
    [HideInInspector] public AudioSource AudioPlayer;
    private bool DontDestroyOnLoadDone = false;

    void Awake()
    {
        MainCamera.backgroundColor = LevelInfos[NowLevelId].ThisLevelCameraBackColor;
        MainCamera = FindObjectOfType<UnityEngine.Camera>();
        PlayButton = FindObjectOfType<PlayLevel>();
        AudioPlayer = FindObjectOfType<AudioSource>();
        AudioPlayer.clip = LevelInfos[NowLevelId].ThisLevelSound;
        MainCamera.transform.GetChild(0).GetComponent<ParticleSystem>().Play();
        AudioPlayer.Play();
        LevelModelHolder.transform.position = LevelInfos[0].ModelPosition;
    }

    void Start()
    {
        if (!DontDestroyOnLoadDone)
        {
            DontDestroyOnLoad(AudioPlayer);
            DontDestroyOnLoadDone = true;
        }
    }

    public void MassageSeter()
    {
        if (PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "Percentage") >= NowPer)
        {
            NowPer = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "Percentage");
        }
        if (PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "DiamondCount") >= NowDia)
        {
            NowDia = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "DiamondCount");
        }
        if (PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "CrownCount") >= NowCro)
        {
            NowCro = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "CrownCount");
        }
    }

    public void MassageChanger()
    {
        AudioPlayer.clip = LevelInfos[NowLevelId].ThisLevelSound;
        NameText.text = LevelInfos[NowLevelId].LevelName;
        SceneName = LevelInfos[NowLevelId].SceneName;
        NowRecordId = LevelInfos[NowLevelId].RecordId;
        NowPer = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "Percentage");
        NowDia = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "DiamondCount");
        NowCro = PlayerPrefs.GetInt(LevelInfos[NowLevelId].RecordId.ToString() + "CrownCount");
    }

    public void PDC_TextChanger()
    {
        DiamondText.text = NowDia + "/" + LevelInfos[NowLevelId].MaxDiamondCount;
        PercentageText.text = NowPer + "%";
    }

    void Update()
    {
        MassageSeter();
        MassageChanger();
        PDC_TextChanger();

        if (NowLevelId <= 0)
        {
            LeftButton.GetComponent<Image>().color = new Color(0.5882353f, 0.5882353f, 0.5882353f, 1f);
            LeftButton.GetComponent<Button>().enabled = false;
        }
        else
        {
            LeftButton.GetComponent<Image>().color = new Color(1f, 1f, 1f, 1f);
            LeftButton.GetComponent<Button>().enabled = true;
        }
        if (NowLevelId >= LevelInfos.Length - 1)
        {
            RightButton.GetComponent<Image>().color = new Color(0.5882353f, 0.5882353f, 0.5882353f, 1f);
            RightButton.GetComponent<Button>().enabled = false;
        }
        else
        {
            RightButton.GetComponent<Image>().color = new Color(1f, 1f, 1f, 1f);
            RightButton.GetComponent<Button>().enabled = true;
        }

        if (NowCro < 1)
        {
            LevelInfos[NowLevelId].ThisLevelCrownModel1.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelCrownModel2.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelCrownModel3.SetActive(false);
        }
        if (NowCro == 1)
        {
            LevelInfos[NowLevelId].ThisLevelCrownModel1.SetActive(true);
            LevelInfos[NowLevelId].ThisLevelCrownModel2.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelCrownModel3.SetActive(false);
        }
        if (NowCro == 2)
        {
            LevelInfos[NowLevelId].ThisLevelCrownModel1.SetActive(true);
            LevelInfos[NowLevelId].ThisLevelCrownModel2.SetActive(true);
            LevelInfos[NowLevelId].ThisLevelCrownModel3.SetActive(false);
        }
        if (NowCro >= 3)
        {
            LevelInfos[NowLevelId].ThisLevelCrownModel1.SetActive(true);
            LevelInfos[NowLevelId].ThisLevelCrownModel2.SetActive(true);
            LevelInfos[NowLevelId].ThisLevelCrownModel3.SetActive(true);
        }

        if (NowCro >= 3 && NowDia >= 10 && NowPer >= 100)
        {
            LevelInfos[NowLevelId].ThisLevelCrownModel1.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelCrownModel2.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelCrownModel3.SetActive(false);
            LevelInfos[NowLevelId].ThisLevelPerfectCrownHolder.SetActive(true);
        }
        else
        {
            LevelInfos[NowLevelId].ThisLevelPerfectCrownHolder.SetActive(false);
        }

        if (NowLevelId + 1 < LevelInfos.Length)
        {
            LV3Next = LevelInfos[NowLevelId + 1].ModelPosition;
        }
        if (NowLevelId - 1 >= 0)
        {
            LV3Last = LevelInfos[NowLevelId - 1].ModelPosition;
        }
    }
}

}

运行结果及报错内容

UnityException：Transform child of bounds
MaxIceFlameTemplate.UI.MenuSettings.Awake () (脚本路径）

我的解答思路和尝试过的方法

网上有说是父子关系有问题，有尝试新建canvas，不行，怀疑是动了unity编辑器的某些功能

我想要达到的结果

保持原功能，不报错

Answer 1

猜测：MainCamera下面有子物体吗？

这个：

这个脚本路径应该可以精确到是哪行，针对性看一下就可以了