NullReferenceException at at GoogleMobileAds.Api.MobileAds.Initialize (System.Action`1[T] initCompleteAction) [0x00000] in <00000000000000000000000000000000>:0

Hello. There is a problem with google AdMob. Test ads are shown in the editor (There are no errors in the editor), but real ads are not showing on my phone. Then I decided to use USB debugging and found out that the following error occurs:

“NullReferenceException: Object reference not set to an instance of an object.
at GoogleMobileAds.Api.MobileAds.Initialize (System.Action`1[T] initCompleteAction) [0x00000] in <00000000000000000000000000000000>:0
at Show_ads.Start () [0x00000] in <00000000000000000000000000000000>:0”

Here’s my script:

using GoogleMobileAds.Api;
using System.Collections;
using System;
using UnityEngine.Scripting;
[assembly: Preserve]

public class Show_ads : MonoBehaviour
{
//ADS----------------------------
private RewardedAd rewardedAd;
private const string RewardedID = “id”;
//ADS----------------------------

void Start()
{
    MobileAds.Initialize(initStatus => { });
    LoadRewardedAD();
}

private void LoadRewardedAD()
{
    //load-ad
    rewardedAd = new RewardedAd(RewardedID);
    AdRequest adRequest = new AdRequest.Builder().Build();
    rewardedAd.LoadAd(adRequest);

    rewardedAd.OnUserEarnedReward += HandleUserEarnedReward;
 }
 //Called from another script
public void ShowRewardedAD()
{
    if (rewardedAd.IsLoaded())
    {
        rewardedAd.Show();
    }
}
public void HandleUserEarnedReward(object sender, Reward args)
{
    if (Reward_type == 0)
    {
  //gem
    }
    else if (Reward_type == 1)
    {
        //coin

    }
    else if (Reward_type == 2)
    {
        //Respawn

    }
}

private IEnumerator WaitAD()
{
    yield return new WaitForSeconds(3);
    LoadRewardedAD();
}

}

Who can help?

Hello Hacker237
did you fix this error?
I also got the same error.

hi Hacker237, did you manage to solve this issue ? if so, how did you do it ?

No I have not solve this error yet. I just dont use Admob anymore. I asked a lot about this problem but nobody can help me.