Question by Ace00001 · Jul 12, 2020 at 05:20 PM · admob singleton threads threading

Using admob rewarded ad in unity singleton pattern

I am using admob ads in my app and they are working fine. But when i try to do something after a ad close or reward earned call back my code breaks. Following is my adMob script

 public class AdMobScript : MonoBehaviour
 {
     ...
 
     public event Action OnReviveRewardEarned;
     public event Action OnReviveAdLoaded;
     public event Action OnReviveAdClosed;
 
     private void LoadReviveRewardedAd()
     {
 
         reviveRewardedAd = new RewardedAd(adReviveRewardedId);
 
         reviveRewardedAd.OnAdLoaded += ReviveAdLoaded;
         reviveRewardedAd.OnUserEarnedReward += ReviveEarnedReward;
         reviveRewardedAd.OnAdClosed += ReviveAdClosed;
 
         AdRequest request = new AdRequest.Builder().Build();
         reviveRewardedAd.LoadAd(request);
 
     }
 
     private void ReviveAdClosed(object sender, EventArgs e)
     {
         LoadReviveRewardedAd();
         if (isRewardErned)
         {
             isRewardErned = false;
             OnReviveRewardEarned.Invoke();
         }
         else
             OnReviveAdClosed.Invoke();
     }
 
     private void ReviveEarnedReward(object sender, Reward e)
     {
         isRewardErned = true;
     }
 
     private void ReviveAdLoaded(object sender, EventArgs e)
     {
         //reviveButton.interactable = true;
         OnReviveAdLoaded.Invoke();
     }
 
     public void ShowAdToRevive()
     {
         if (reviveRewardedAd.IsLoaded())
         {
             reviveRewardedAd.Show();
         }
     }
     ...
 }

In the callbacks i am calling my adManager script which is in term using adMob script. Here is the code for it.

 public class AdManager : MonoBehaviour
 {
    ...
    private void Start() {
 
         AdMobScript.instance.OnReviveAdClosed += ReviveAdClosed;
         AdMobScript.instance.OnReviveAdLoaded += ReviveAdLoaded;
         AdMobScript.instance.OnReviveRewardEarned += ReviveReward;
 
     }
 
     #region ReviveAds
     private void ReviveReward() {
         //game crash here
         backButton.gameObject.SetActive(true);
         reviveButton.gameObject.SetActive(false);
         noThanksButton.gameObject.SetActive(false);
         manager.Revive();
     }
     private void ReviveAdLoaded() {
         reviveButton.interactable = true;
     }
     private void ReviveAdClosed() {
         //game crash here
         reviveButton.interactable = false;
     }
 
     public void ShowAdToRevive() {
         AdMobScript.instance.ShowAdToRevive();
     }
    ...
 }

After either ad close or reward earned my game crashes (error log says