Hello recently we have made few updates to push notification feature … so in order to re-enable the push notifications please follow these steps !
… to enable the push notification you need to make few changes on server side … follow the following instructions
copy and paste the contents of above key to new file and save it
then update the database_url in api_config.properties file to
database_url = https://nearby-shops-9fae2.firebaseio.com