Question about a Firebase / Google Maps issue

Hey everyone,
I am new to flutterflow and coding (but I do have an engineering background). I am trying to build a Google Maps type app, but I run into an issue when trying to reach the Google Map page. When going into test mode on flutterflow, I click on the widget to go to the "Map Page," but I now get an "Unexpected null value" error.

I have One "test location" in place (i.e. correlated between Flutterflow Firestore and Google Firebase). I am able to see the Firestore get populated after updating the Firebase.

On the Google Map Widget I used the "Marker Documents" to choose "locations Documents" where locations is the name of my Firestore collection-schema.

Perhaps I need the "Data Schema" filled out somehow also? Am I loading in the wrong variables to the Google Map Widget? Are my firebase rules out of date or causing issues?

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