title: Admob Native ads failed to load with error code 0
body: <pre><code>NativeExpressAdView adView = (NativeExpressAdView) findViewById(R.id.adView);
           adView.loadAd(new AdRequest.Builder().build());
  
  NativeExpressAdView is working fine but
  
  AdLoader.Builder builder = new AdLoader.Builder(con, ADMOB_AD_UNIT_ID);
  
  /*if (requestAppInstallAds)*/ {
      builder.forAppInstallAd(new NativeAppInstallAd.OnAppInstallAdLoadedListener() {
          @Override
          public void onAppInstallAdLoaded(NativeAppInstallAd ad) {
              //FrameLayout frameLayout =(FrameLayout) findViewById(R.id.fl_adplaceholder);
              // NativeAppInstallAdView adView = (NativeAppInstallAdView) getLayoutInflater().inflate(R.layout.ad_app_install, null);
  
          }
      });
  }
  
  
      adLoader = builder.withAdListener(new AdListener() {
          @Override
          public void onAdFailedToLoad(int errorCode) {
              Toast.makeText(con, "Failed to load native ad: "
                      + errorCode, Toast.LENGTH_SHORT).show();
          }
  
          @Override
          public void onAdClosed() {
              super.onAdClosed();
  
          }
      }).build();
  
  
      //adLoader.loadAd(new AdRequest.Builder().addTestDevice("9221FAA48B3F9AD9AA72601953B89E76").build());
      adLoader.loadAd(new AdRequest.Builder().build());
  </code></pre>
  
  <p>works fine with test ads if use live ads id its show failed to load error code 0 Why?</p>