I am attempting to use the Public Configuration widget in Web AppBuilder on ArcGIS online. I created a web map that contains a map service layer with our county parcels, and then created a Web AppBuilder app from that map. I added the Public Notification widget but when I click on it, it says "No layers with addresses templates popups have been configured". When I go into the configuration no layers show up under the "Address Layers" tab.
I have configured the popups for the parcels layer with the following expression:
{relationships/0/FULLNAME}
{relationships/0/MAILINGADDRESS}
{relationships/0/CITY}, {relationships/0/STATE}, {relationships/0/ZIPCODE}
This seems to match the screenshot that is in the documentation for the widget but the documentation is pretty vague on how to configure the layer for use with the Mailing notification widget.
What do I need to do to get the configure the feature layer so that it is usable with the Public Notification Widget?