Admob测试广告没有在真实设备中展示？

Question

我遇到了一个问题，因为我的广告没有显示在我的真实设备中，而是显示在模拟器中，使用logcat出现错误，这就是我得到的：

我不知道该怎么办才能解决问题，因为我觉得自己做对了所有事情。

您中的有些人可能会要求提供可能有用的代码，这是我的AdManager脚本，该脚本可能看起来很长，但是很简单..

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 <ItemGroup>
  <None Include="$(ProjectDir)content\extraFolder\test.txt">
     <Link>test.txt</Link>
     <CopyToOutputDirectory>Always</CopyToOutputDirectory>
  </None>
 </ItemGroup>
</Project>

实际上我遇到两个错误，第一个是在我叫横幅时，这表示我在该方法上存在问题：

public static AdManager Instance
{
    get;
    set;
}
public bool InterstitialLoaded = false;
public bool InterstitialClosed = false;

public string BannerAdId = "ca-app-pub-3940256099942544/6300978111";
public string InterstitialAdId = "ca-app-pub-3940256099942544/1033173712";
InterstitialAd interstitialAd;
AdRequest request;
private BannerView bannerView;

public void requestAds()
{
    if (PlayerPrefs.GetInt("NoPersonalized") == 1)
    {
        request = new AdRequest.Builder().AddExtra("npa", "1").Build();
        Debug.Log("NoPersonalized ads EU");

    }
    else
    {
        if (PlayerPrefs.GetInt("FirstTime") == 1)
        {
            if (PlayerPrefs.GetInt("Localized") == 1)
            {
                //request = new AdRequest.Builder().Build();
                request = new AdRequest.Builder().Build();
                Debug.Log("Personalized ads EU");
            }
        }
        else if (PlayerPrefs.GetInt("BBb") == 1)
        {
            if (PlayerPrefs.GetInt("Localized") == 0)
            {
                request = new AdRequest.Builder().Build();
                Debug.Log("personalized No EU");
            }
            else
            {
                Debug.Log("First time need select ");
                request = new AdRequest.Builder().Build();
            }
        }


        else if (PlayerPrefs.GetInt("NotEU") == 1)
        {
            Debug.Log("Personalized Not EU ");
            request = new AdRequest.Builder().Build();
        }
    }



}
private void Awake()
{
    if (Instance == null)
        Instance = this;
    else
        Destroy(gameObject);
    DontDestroyOnLoad(gameObject);
    interstitialAd = new InterstitialAd(InterstitialAdId);

    Showbanner();
    requestAds();

    interstitialAd.LoadAd(request);
}

public void RequestBanner()
{
    bannerView = new BannerView(BannerAdId, AdSize.Banner, AdPosition.Bottom);
    requestAds();
    bannerView.LoadAd(request);
    bannerView.Show();

}
public void Showbanner()
{

        RequestBanner();
}
public void HideBanner()
{
    bannerView.Destroy();
    bannerView.Hide();
    bannerView.Destroy();
}

public void ShowInterstitial()
{
    requestAds();
    interstitialAd.LoadAd(request);
    if (interstitialAd.IsLoaded())
    {

        InterstitialLoaded = true;
        interstitialAd.Show();
    }
    else
    {

    }

    interstitialAd.OnAdClosed += InterstitialAd_onAdClosed;
}

private void InterstitialAd_onAdClosed(object sender, System.EventArgs e)
{
    InterstitialLoaded = false;
    InterstitialClosed = true;
}

}

我几天来一直遇到这个问题，希望任何人都能提供帮助。

任何帮助将不胜感激。