returns null subtype err while getting getDetailsByPlaceId

[wrteam02]

Unhandled Exception: type 'Null' is not a subtype of type 'Map<String, dynamic>' in type cast
E/flutter ( 7790): #0 _$PlacesDetailsResponseFromJson (package:google_maps_webservice/src/places.g.dart:294:50)
E/flutter ( 7790): #1 new PlacesDetailsResponse.fromJson (package:google_maps_webservice/src/places.dart:838:7)
E/flutter ( 7790): #2 GoogleMapsPlaces._decodeDetailsResponse (package:google_maps_webservice/src/places.dart:528:29)
E/flutter ( 7790): #3 GoogleMapsPlaces.getDetailsByPlaceId (package:google_maps_webservice/src/places.dart:126:12)

[casumatt]

An update on this item please. Here is the code (Flutter/Dart) causing the issues. If I remove the field mask it works fine.

PlacesDetailsResponse detail = await places.getDetailsByPlaceId(
            addressPlaceId,
            fields: ['places.location'],
          );