Java Question Facebook Audience libraries

package b4a.facebookaudi;


import com.facebook.ads.*;

import android.R;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.RelativeLayout;
import android.widget.Toast;


import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.BA.ActivityObject;
import anywheresoftware.b4a.BA.DependsOn;
import anywheresoftware.b4a.BA.DontInheritEvents;
import anywheresoftware.b4a.BA.Events;
import anywheresoftware.b4a.BA.Permissions;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;
import anywheresoftware.b4a.objects.ViewWrapper;

@SuppressWarnings("unused")
@Version(1.0f)
@ShortName("FaceBookAudi")
@Events(values={"adLoaded", "IntAdError (ErrorCode As String)",
      "AdScreenDismissed", "error"})
@ActivityObject
@DontInheritEvents
@Permissions(values={"android.permission.INTERNET", "android.permission.ACCESS_NETWORK_STATE"})
@DependsOn(values={"AudienceNetwork.aar","DebugSettings.aar","com.android.support:support-v4"}) //


public class FacebookAudi extends ViewWrapper<AdView> {
    private InterstitialAd interstitialAd;
    private String eventName;
    private BA ba;
    private AdView adView;
    public static Object SIZE_320 = AdSize.BANNER_320_50;
    public static Object SIZE_H50 = AdSize.BANNER_HEIGHT_50;
    public static Object SIZE_H90 = AdSize.BANNER_HEIGHT_90;
    public static Object SIZE_RH250 = AdSize.RECTANGLE_HEIGHT_250;
    
        
    public void InterstitialAd(final BA ba,String PublisherId,String EventName) {
        this.ba = ba;
        eventName = EventName.toLowerCase(BA.cul);
        interstitialAd = new InterstitialAd(ba.context, PublisherId);
        
          interstitialAd.setAdListener(new InterstitialAdListener() {
          @Override
          public void onInterstitialDisplayed(Ad ad) {
            // Interstitial displayed callback
          }

          @Override
          public void onInterstitialDismissed(Ad ad) {
            // Interstitial dismissed callback
          }

          @Override
          public void onError(Ad ad, AdError adError) {
            // Ad error callback
            //Toast.makeText(MainActivity.this, "Error: " + adError.getErrorMessage(),
            //Toast.LENGTH_LONG).show();
          }

          @Override
          public void onAdLoaded(Ad ad) {
            // Show the ad when it's done loading.
            ba.raiseEvent(this, eventName + "_adLoaded"); 
            interstitialAd.show();               
          }

          @Override
          public void onAdClicked(Ad ad) {
            // Ad clicked callback
          }

          @Override
          public void onLoggingImpression(Ad ad) {
            // Ad impression logged callback       
          }
        });

        // For auto play video ads, it's recommended to load the ad
        // at least 30 seconds before it is shown
        interstitialAd.loadAd();
      }

java.lang.NoClassDefFoundError: com.facebook.ads.internal.view.b.e
    at com.facebook.ads.internal.view.b.d.a(Unknown Source)
    at com.facebook.ads.internal.view.b.d.<init>(Unknown Source)
    at com.facebook.ads.internal.view.b.b.<init>(Unknown Source)
    at com.facebook.ads.internal.view.o.<init>(Unknown Source)
    at com.facebook.ads.internal.view.n.<init>(Unknown Source)
    at com.facebook.ads.internal.adapters.l$3.a(Unknown Source)
    at com.facebook.ads.internal.adapters.l$3.a(Unknown Source)
    at com.facebook.ads.internal.c.b$1$2.run(Unknown Source)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5551)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)

#AdditionalJar: com.android.support:appcompat-v7
#AdditionalJar: com.android.support:recyclerview-v7
#AdditionalJar: com.android.support:support-annotations
#AdditionalJar: com.google.android.gms:play-services-ads