Объявления Admob не загружаются - Не удалось загрузить объявление: 0

Я пытаюсь загрузить объявления Admob Native. Раньше (до того, как приложение было обновлено) объявления показывались, но теперь они не отображаются. Я разместил код, xml и Logcat ниже.

код

NativeExpressAdView adView = (NativeExpressAdView) myView.findViewById(R.id.adView);

    AdRequest request = new AdRequest.Builder()
            .addTestDevice("5BCFF0AAE83AF424648A954038C71DE6")
            .addTestDevice("A5E3E2068BD88202CBC281AD76984BEE")//infocus
            .build();

    adView.loadAd(request);

XML

<com.google.android.gms.ads.NativeExpressAdView
            android:id="@+id/adView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            ads:adSize="320x150"
            ads:adUnitId="ca-app-pub-5059726881726792/6223900262"></com.google.android.gms.ads.NativeExpressAdView>

Logcat

07-14 20:39:57.349 11508-11508/? W/Ads: Failed to load ad: 0
07-14 20:40:07.373 11508-11663/? W/Ads: There was a problem getting an ad response. ErrorCode: 0

Fail to forward ad response.
                                  android.os.DeadObjectException
                                      at android.os.BinderProxy.transactNative(Native Method)
                                      at android.os.BinderProxy.transact(Binder.java:511)
                                      at com.google.android.gms.ads.internal.request.ab.a(:com.google.android.gms:93)
                                      at com.google.android.gms.ads.internal.request.service.i.run(:com.google.android.gms:638)
                                      at com.google.android.gms.ads.internal.util.u.call(:com.google.android.gms:1055)
                                      at com.google.android.gms.ads.internal.util.v.run(:com.google.android.gms:75)
                                      at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
                                      at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                      at java.lang.Thread.run(Thread.java:818)

07-14 20:40:19.539 1975-4922/? W/Ads: Fail to forward ad response.
                                  android.os.DeadObjectException
                                      at android.os.BinderProxy.transactNative(Native Method)
                                      at android.os.BinderProxy.transact(Binder.java:511)
                                      at com.google.android.gms.ads.internal.request.ab.a(:com.google.android.gms:93)
                                      at com.google.android.gms.ads.internal.request.service.i.run(:com.google.android.gms:638)
                                      at com.google.android.gms.ads.internal.util.u.call(:com.google.android.gms:1055)
                                      at com.google.android.gms.ads.internal.util.v.run(:com.google.android.gms:75)
                                      at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:423)
                                      at java.util.concurrent.FutureTask.run(FutureTask.java:237)
                                      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                      at java.lang.Thread.run(Thread.java:818)