How to fix an error when adding AdMob?

Question

C++ / C#

I decided to embed AdMob into the game, added it, wrote a class for displaying ads, built it, everything works for me. I updated the version of the game on Google Play, a friend downloaded it and the game crashed, giving the following error: The



question is how to fix it?
My code:

using UnityEngine;
using GoogleMobileAds.Api;
using System;

public class AdmobRewardedVideoHelper : MonoBehaviour
{
    [SerializeField]
    private GameCore core;
    [SerializeField]
    private const string adUnitId = "/* id */";
    [SerializeField]
    private RewardedAd rewardedAd;
    [SerializeField]
    private AnalyticsHelper analytics;
    [SerializeField]
    private BonusesHelper bonusesHelper;
    [SerializeField]
    private int type;
    void Start()
    {
        core = FindObjectOfType<GameCore>();
        bonusesHelper = FindObjectOfType<BonusesHelper>();
        analytics = FindObjectOfType<AnalyticsHelper>();

        // Initialize the Google Mobile Ads SDK.
        MobileAds.Initialize(initStatus => { Debug.Log("[AdmobRewardedVideoHelper] - MobileAds.Initialize - initStatus -> " + initStatus); });
        RewardedAdRequest();
    }

    private void RewardedAdRequest()
    {
        rewardedAd = new RewardedAd(adUnitId);

        // Called when an ad request has successfully loaded.
        rewardedAd.OnAdLoaded += HandleRewardedAdLoaded;
        // Called when an ad request failed to load.
        rewardedAd.OnAdFailedToLoad += HandleRewardedAdFailedToLoad;
        // Called when an ad is shown.
        rewardedAd.OnAdOpening += HandleRewardedAdOpening;
        // Called when an ad request failed to show.
        rewardedAd.OnAdFailedToShow += HandleRewardedAdFailedToShow;
        // Called when the user should be rewarded for interacting with the ad.
        rewardedAd.OnUserEarnedReward += HandleUserEarnedReward;
        // Called when the ad is closed.
        rewardedAd.OnAdClosed += HandleRewardedAdClosed;

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the rewarded ad with the request.
        rewardedAd.LoadAd(request);
    }

    private void HandleRewardedAdClosed(object sender, EventArgs e)
    {
        Debug.Log("[AdmobRewardedVideoHelper] - HandleRewardedAdClosed -> Ad Closed");
        RewardedAdRequest();
    }

    private void HandleUserEarnedReward(object sender, Reward e)
    {
        switch (type)
        {
            case 1:
                bonusesHelper.GetReward();
                break;

            case 2:
                core.tasks.taskType = 0;
                analytics.TaskSkipAnalyticsHanlder();
                break;
        }
        Debug.Log("[AdmobRewardedVideoHelper] - HandleUserEarnedReward -> Ad Earned Reward");
    }

    private void HandleRewardedAdFailedToShow(object sender, AdErrorEventArgs e)
    {
        Debug.Log("[AdmobRewardedVideoHelper] - HandleRewardedAdFailedToShow -> Ad Failed To Show");
        RewardedAdRequest();
    }

    private void HandleRewardedAdOpening(object sender, EventArgs e)
    {
        Debug.Log("[AdmobRewardedVideoHelper] - HandleRewardedAdOpening -> Ad Opening");
    }

    private void HandleRewardedAdFailedToLoad(object sender, AdErrorEventArgs e)
    {
        Debug.Log("[AdmobRewardedVideoHelper] - HandleRewardedAdFailedToLoad -> Ad Not Loaded");
        RewardedAdRequest();
    }

    private void HandleRewardedAdLoaded(object sender, EventArgs e)
    {
        Debug.Log("[AdmobRewardedVideoHelper] - HandleRewardedAdLoaded -> Ad Loaded");
    }

    public void WatchAd(int type)
    {
        this.type = type;

        if (rewardedAd.IsLoaded())
        {
            rewardedAd.Show();
        }
    }
}

Manifesto:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.google.unity.ads" android:versionName="1.0" android:versionCode="1">
  <application>
    <uses-library android:required="false" android:name="org.apache.http.legacy" />
    <activity android:name="com.unity3d.player.UnityPlayerNativeActivity" android:label="BitClicker">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
      <meta-data android:name="unityplayer.ForwardNativeEventsToDalvik" android:value="true" />
    </activity>
    <meta-data android:name="com.google.android.gms.ads.APPLICATION_ID" android:value="" />
  </application>
</manifest>

I had to manually enter the name of the game, since Unity could not find a link to the string resource during compilation.