JSON sent:
{"app_id":"4cb48251-e0c0-4edb-8211-16beb03318d1","included_segments":["All"],"data":{"foo":"bar"},"contents":{"en":"English Message"}}<pre>Array
(
    [id] => 
    [errors] => Array
        (
            [0] => All included players are not subscribed
        )

    [warnings] => Array
        (
            [0] => FCM Errors: (FCM API (V1) Update Required) Your Android audience has stopped receiving messages. You must update your Firebase account. It takes just a few minutes when you follow our guide.
        )

)


JSON received:
stdClass Object
(
    [allresponses] => {"id":"","errors":["All included players are not subscribed"],"warnings":["FCM Errors: (FCM API (V1) Update Required) Your Android audience has stopped receiving messages. You must update your Firebase account. It takes just a few minutes when you follow our guide."]}
)