UnityAds奖励广告不给予奖励

Question

玩家可以观看奖励的广告，但不会获得奖励。 你能帮我解决我的问题吗？

我已多次检查代码。

using UnityEngine.Advertisements;
using UnityEngine;
using UnityEngine.UI;

    public void Start()
    {
       Advertisement.Initialize(GameId);

    }

 public void ShowRewardedAd()
    {
        if (Advertisement.IsReady("rewardedVideo"))
        {
            var options = new ShowOptions { resultCallback = HandleShowResult};
            Advertisement.Show("rewardedVideo");   
        }
    }


    public static void HandleShowResult(ShowResult result)
    {
        switch (result)
        {
            case ShowResult.Finished:
                Debug.Log("The ad was successfully shown.");
                ToReceiveReward = true;
                break;
            case ShowResult.Skipped:
                Debug.Log("The ad was skipped before reaching the end.");
                break;
            case ShowResult.Failed:
                Debug.LogError("The ad failed to be shown.");
                break;
        }
    }

if(ToReceiveReward == true)
        {
            Debug.Log("receive reward");
            MainScript.CurrentCoins += 200;
            ToReceiveReward = false;
        }

我希望玩家在观看奖励的广告后获得奖励

谢谢Quint van Oorschot