Error while parsing timestamp in GCM

07-18 17:22:37.347 W/FirebaseMessaging(18679): Error while parsing timestamp in GCM event
07-18 17:22:37.347 W/FirebaseMessaging(18679): java.lang.NumberFormatException: s == null
07-18 17:22:37.347 W/FirebaseMessaging(18679): at java.lang.Integer.parseInt(Integer.java:577)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at java.lang.Integer.valueOf(Integer.java:801)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.messaging.zzd.zzb(Unknown Source:60)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.messaging.zzd.zzh(Unknown Source:84)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.messaging.FirebaseMessagingService.zzo(Unknown Source:35)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.iid.zzf.zza(Unknown Source:38)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.iid.zzh.zzcfv(Unknown Source:80)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.iid.zzh.zza(Unknown Source:29)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.google.firebase.iid.FirebaseInstanceIdInternalReceiver.onReceive(Unknown Source:41)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.app.ActivityThread.handleReceiver(ActivityThread.java:3380)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.app.ActivityThread.access$1200(ActivityThread.java:200)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1662)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.os.Handler.dispatchMessage(Handler.java:106)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.os.Looper.loop(Looper.java:193)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at android.app.ActivityThread.main(ActivityThread.java:6692)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at java.lang.reflect.Method.invoke(Native Method)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
07-18 17:22:37.347 W/FirebaseMessaging(18679): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
07-18 17:22:37.349 W/FirebaseMessaging(18679): Unable to log event: analytics library is missing