Banner onAdFailedToLoad: errorCode:3

[AhmedAbogameel]

// this is my widget using real adUnitId

DFPBanner( isDevelop: false, adUnitId: '/XXXXXX/XXXXXXX/XXXXXX', adSize: DFPAdSize.custom(height: 250,width: 360,), testDevices: MyTestDevices(), onAdLoaded: () { print('Banner onAdLoaded'); }, onAdFailedToLoad: (errorCode) { print('Banner onAdFailedToLoad: errorCode:$errorCode'); }, onAdOpened: () { print('Banner onAdOpened'); }, onAdClosed: () { print('Banner onAdClosed'); }, onAdLeftApplication: () { print('Banner onAdLeftApplication'); }, )

[AhmedAbogameel]

This is what shown in the console

W/GooglePlayServicesUtil( 1690): Google Play Store is missing. W/GooglePlayServicesUtil( 1690): Google Play Store is missing. I/Ads ( 1690): This request is sent from a test device. W/GooglePlayServicesUtil( 1690): Google Play Store is missing. W/art ( 1690): Long monitor contention with owner gads-29 (1908) at java.lang.String com.google.android.ads.z__.p.a(android.content.Context)(:-1) waiters=3 in void com.google.android.gms.internal.ads.zzeq.zzcx() for 292ms W/art ( 1690): Long monitor contention with owner gads-35 (1916) at void com.google.android.gms.internal.ads.zzey.zzcx()(:3) waiters=3 in void com.google.android.gms.internal.ads.zzeu.zzcx() for 300ms W/art ( 1690): Long monitor contention with owner gads-35 (1916) at void com.google.android.gms.internal.ads.zzey.zzcx()(:3) waiters=4 in void com.google.android.gms.internal.ads.zzen.zzcx() for 288ms W/art ( 1690): Long monitor contention with owner gads-35 (1916) at void com.google.android.gms.internal.ads.zzey.zzcx()(:3) waiters=5 in void com.google.android.gms.internal.ads.zzep.zzcx() for 231ms W/art ( 1690): Long monitor contention with owner gads-35 (1916) at void com.google.android.gms.internal.ads.zzey.zzcx()(:3) waiters=6 in void com.google.android.gms.internal.ads.zzfb.zzcx() for 225ms W/art ( 1690): Suspending all threads took: 26.252ms W/GooglePlayServicesUtil( 1690): Google Play Store is missing. I/Ads ( 1690): SDK version: afma-sdk-a-v15000000.15000000.0 I/Ads ( 1690): Ad failed to load : 3 I/flutter ( 1690): Banner onAdFailedToLoad: errorCode:3

[AhmedAbogameel]

This is my test devices class

class MyTestDevices extends TestDevices { static MyTestDevices _instance;

factory MyTestDevices() { if (_instance == null) _instance = MyTestDevices._internal(); return _instance; }

MyTestDevices._internal();

@override List<String> get values => List()..add("66A234E7398C8D401744F0137499F8C2"); }