Program: 53337
Project: 53337
Buggy source:
@Override public void requestBannerAd(final Context context,final CustomEventBannerListener customEventBannerListener,final String s,final AdSize adSize,final MediationAdRequest mediationAdRequest,final Bundle bundle){
  if (AppLovinSdk.VERSION_CODE < 710 && !(context instanceof Activity)) {
    log(ERROR,"String_Node_Str");
    customEventBannerListener.onAdFailedToLoad(AdRequest.ERROR_CODE_INTERNAL_ERROR);
    return;
  }
  log(DEBUG,"String_Node_Str" + adSize);
  final AppLovinAdSize appLovinAdSize=appLovinAdSizeFromAdMobAdSize(adSize);
  if (appLovinAdSize != null) {
    final AppLovinSdk sdk=AppLovinSdk.getInstance(context);
    sdk.setPluginVersion("String_Node_Str");
    adView=new AppLovinAdView(appLovinAdSize,context);
    adView.setAdLoadListener(new AppLovinAdLoadListener(){
      @Override public void adReceived(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
      @Override public void failedToReceiveAd(      final int errorCode){
        log(ERROR,"String_Node_Str" + errorCode);
        customEventBannerListener.onAdFailedToLoad(toAdMobErrorCode(errorCode));
      }
    }
);
    adView.setAdDisplayListener(new AppLovinAdDisplayListener(){
      @Override public void adDisplayed(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
      @Override public void adHidden(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
    }
);
    adView.setAdClickListener(new AppLovinAdClickListener(){
      @Override public void adClicked(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
        customEventBannerListener.onAdOpened();
        customEventBannerListener.onAdLeftApplication();
      }
    }
);
    adView.loadNextAd();
    customEventBannerListener.onAdLoaded(adView);
  }
 else {
    log(ERROR,"String_Node_Str");
    customEventBannerListener.onAdFailedToLoad(AdRequest.ERROR_CODE_INTERNAL_ERROR);
  }
}

Fixed version (ground truth):
@Override public void requestBannerAd(final Context context,final CustomEventBannerListener customEventBannerListener,final String s,final AdSize adSize,final MediationAdRequest mediationAdRequest,final Bundle bundle){
  if (AppLovinSdk.VERSION_CODE < 710 && !(context instanceof Activity)) {
    log(ERROR,"String_Node_Str");
    customEventBannerListener.onAdFailedToLoad(AdRequest.ERROR_CODE_INTERNAL_ERROR);
    return;
  }
  log(DEBUG,"String_Node_Str" + adSize);
  final AppLovinAdSize appLovinAdSize=appLovinAdSizeFromAdMobAdSize(adSize);
  if (appLovinAdSize != null) {
    final AppLovinSdk sdk=AppLovinSdk.getInstance(context);
    sdk.setPluginVersion("String_Node_Str");
    adView=createAdView(appLovinAdSize,context,customEventBannerListener);
    adView.setAdLoadListener(new AppLovinAdLoadListener(){
      @Override public void adReceived(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
      @Override public void failedToReceiveAd(      final int errorCode){
        log(ERROR,"String_Node_Str" + errorCode);
        customEventBannerListener.onAdFailedToLoad(toAdMobErrorCode(errorCode));
      }
    }
);
    adView.setAdDisplayListener(new AppLovinAdDisplayListener(){
      @Override public void adDisplayed(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
      @Override public void adHidden(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
      }
    }
);
    adView.setAdClickListener(new AppLovinAdClickListener(){
      @Override public void adClicked(      final AppLovinAd ad){
        log(DEBUG,"String_Node_Str");
        customEventBannerListener.onAdOpened();
        customEventBannerListener.onAdLeftApplication();
      }
    }
);
    adView.loadNextAd();
    customEventBannerListener.onAdLoaded(adView);
  }
 else {
    log(ERROR,"String_Node_Str");
    customEventBannerListener.onAdFailedToLoad(AdRequest.ERROR_CODE_INTERNAL_ERROR);
  }
}