我在一个Android游戏工作，我想添加AdMob广告到我的游戏。我已经添加了横幅和间隙视图，但在RewardBasedVideoAd特别是OnAdRewarded事件的问题，当用户关闭视频返回到游戏，以赚取他的奖励游戏崩溃立即。
经过多次尝试，我发现代码崩溃的游戏，gameObject.SetActive(true)和gameObject.SetActive(false)，是问题，当我停用游戏面板UI和积极的奖励面板UI游戏崩溃立即.
我该如何解决这个问题？为什么当我使用gameObject.SetActive时游戏会崩溃？

导致app崩溃的代码

public void HandleOnAdRewarded(object sender, EventArgs args)
{
   gamePanel.SetActive(false);
   rewardPanel.SetActive(true);
}

申请奖励代码

public void RequestReward()
{
   AdRequest request = new AdRequest().Builder().Build();
   this.rewardAd.LoadAd(request, rewardAdId);

   rewardAd.OnAdLoaded += this.HandleOnRewardAdLoaded;
   rewardAd.OnAdRewarded += this.HandleOnAdRewarded;
   rewardAd.OnAdClosed += this.HandleOnRewardAdClosed;
}

处理程序

public void HandleOnRewardAdLoaded(object sender, EventArgs args)
{
   if(rewardAd.IsLoaded())
   {
       rewardAd.Show();
   }
}

public void HandleOnAdRewarded(object sender, EventArgs args)
{
    gamePanel.SetActive(false);
    rewardPanel.SetActive(true);
}

public HandleOnRewardAdClosed(object sender, EventArgs args)
{
    rewardAd.OnAdLoaded -= this.HandleOnRewardAdLoaded;
    rewardAd.OnAdRewarded -= this.HandleOnAdRewarded;
    rewardAd.OnAdClosed -= this.HandleOnRewardAdClosed;
}