interstitial ad show black (->) AFMA_ReceiveMessag

Question

I followed the official guide of Android to add interstitial ads.

If I use test mode:

 AdRequest adRequest = new AdRequest.Builder()
                  .addTestDevice("my code here")
                  .build();
 mInterstitialAd.loadAd(adRequest);

Works ok and I can see the demo interstitial add.

If I use release mode:

AdRequest adRequest = new AdRequest.Builder().build();
mInterstitialAd.loadAd(adRequest);

I only see black interstitial add and in log in red:

JS: Uncaught ReferenceError: AFMA_ReceiveMessage is not defined (:1)

+ Info:

• I use last updated google play services lib.
• I try with 2 devices and 2 wifi networks.
• In the same device I can see other apps interstitial ads
• The ad was created in adMob in last 24 hours.
• I try to load add fron thread but app crash
• My adMob account is ok, I have other ads working.

Manifest:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

(...)

  <activity android:name="com.google.android.gms.ads.AdActivity"
            android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
            android:theme="@android:style/Theme.Translucent" />

Activity OnCreate:

 mInterstitialAd = new InterstitialAd(this);
    mInterstitialAd.setAdUnitId("here my add id");
    mInterstitialAd.setAdListener(new AdListener() {
        @Override
        public void onAdClosed() {

            requestNewInterstitial();

        }
    });

    requestNewInterstitial();

In app natural break:

 if (mInterstitialAd.isLoaded()) {
           mInterstitialAd.show();
    }

Answer 1

The problem has been solved just waiting 22 hours since the creation of ad in AdMob.

Answer 2

Does webview in your activity? Please comment code:

//webview.pause();

And It works.