Phonegap-plugin-push not work


hi, I have an app ionWordpress and Desktop & Mobile Push Notification System Wordpress Plugin … but I can not set it up …
1: I created Android project in Firebase console with (package = “com.startapplabs.ionWordpress”)
2: I copied google-services.json in the folder where there build.gradle
but I can not receive notifications.
can someone help me pleas