PG3 Notification Node Server 3.5.4 has been released.   See the Release Notes for more information. If you update from a version prior to 3.5.0 you will need to set your Portal API key in the "Custom Configuration Parameters".   To find your portal_api_key open UDMobile, go to Notifications then Settings.  I will release a new version soon which makes this optional. See the README for more information, including information on moving from PG2.