Well Yesterday (13,06,2014) Everyplay send a email and they said "new SDK published" but after establishing this SDK it gives this error and dont show any ads. in past it didnt give this error.
06-14 10:42:00.460: E/UnityAds(32338): com.unity3d.ads.android.d.a.a() (line:-1) :: Couldn't get isDestroyed -method 06-14 10:42:06.055: E/UnityAds(32338): com.unity3d.ads.android.campaign.UnityAdsCampaign.shouldCacheVideo() (line:-1) :: Key not found for campaign: 000000000000000000000001 06-14 10:42:06.055: E/UnityAds(32338): com.unity3d.ads.android.campaign.UnityAdsCampaign.shouldCacheVideo() (line:-1) :: Key not found for campaign: 000000000000000000000001 06-14 10:42:06.055: E/UnityAds(32338): com.unity3d.ads.android.campaign.UnityAdsCampaign.shouldCacheVideo() (line:-1) :: Key not found for campaign: 000000000000000000000002 06-14 10:42:06.055: E/UnityAds(32338): com.unity3d.ads.android.campaign.UnityAdsCampaign.shouldCacheVideo() (line:-1) :: Key not found for campaign: 000000000000000000000002 06-14 10:42:19.318: E/UnityAds(32338): com.unity3d.ads.android.UnityAds.show() (line:-1) :: Could not find activity: [Ljava.lang.StackTraceElement;@4230b028