[Aerogear-users] GCM Registration Not happening

[gaurav singh]

Hi,
I have followed following link for Android app with AeroGear

https://aerogear.org/docs/unifiedpush/aerogear-push-android/guides/

I am not able to receive GCM notification.

When trying to send gcm notification getting following response :-

{
    "multicast_id": 9021705393385917000,
    "success": 0,
    "failure": 1,
    "canonical_ids": 0,
    "results": [
        {
            "error": "NotRegistered"
        }
    ]
}

What can be possible reason for this?