java - una - Revmob `Error inesperado al crear un anuncio de pantalla completa`

que es canvas en facebook

Question

Hoy quería agregar Revmob en mi aplicación y obtuve un error: / La aplicación se cuelga cuando comienza el proceso de carga.

Aquí está el Informe Crash:

03-05 16:53:54.529: D/[RevMob](2268): Unexpected error on create Fullscreen Ad.
03-05 16:53:54.529: D/[RevMob](2268): java.lang.NullPointerException
03-05 16:53:54.529: D/[RevMob](2268):   at com.revmob.ads.fullscreen.FullscreenActivity.initFullscreen(FullscreenActivity.java:158)
03-05 16:53:54.529: D/[RevMob](2268):   at com.revmob.ads.fullscreen.FullscreenActivity.onCreate(FullscreenActivity.java:105)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.Activity.performCreate(Activity.java:5008)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.ActivityThread.access$600(ActivityThread.java:130)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
03-05 16:53:54.529: D/[RevMob](2268):   at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 16:53:54.529: D/[RevMob](2268):   at android.os.Looper.loop(Looper.java:137)
03-05 16:53:54.529: D/[RevMob](2268):   at android.app.ActivityThread.main(ActivityThread.java:4745)
03-05 16:53:54.529: D/[RevMob](2268):   at java.lang.reflect.Method.invokeNative(Native Method)
03-05 16:53:54.529: D/[RevMob](2268):   at java.lang.reflect.Method.invoke(Method.java:511)
03-05 16:53:54.529: D/[RevMob](2268):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-05 16:53:54.529: D/[RevMob](2268):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-05 16:53:54.529: D/[RevMob](2268):   at dalvik.system.NativeStart.main(Native Method)

Gracias !