I've tried to implement OutSystems Maps in a personal project, but, when feeding the "Marker" widget inside the "List" with the "Address" value, it isn't working.
I had activated all services from Google API Key, since I wasn't sure what I would be needing exactly.
The only way to show anything in the map, is by providing the Latitude plus Longitude (separated with a comma "," between the two values), including with your Sample had to change it
FROM:
GetOffices.List.Current.Offices.Address
TO:
GetOffices.List.Current.Offices.Latitude + ", " + GetOffices.List.Current.Offices.Longitude
I've download this Sample, and provided my API Key to it, to see if it was a step I was missing, in order to check your samples, and the "Address" isn't working there as well.
Which means, the application isn't using Geocoding at all (translating written addresses to coordinates).
Could you please check what is going on with your app? Otherwise, using OutSystems Maps requires us to implement the Google Geocoding API, which defeats a bit the purpose of using this Forge Component.
Thank you for your time and patience, will look forward for your answer :)