Compatibility problems with Google Maps API?

[LazerBeams01]

Hello, I'm trying to use this package in a page where I use a map from Google Maps, everything looks fine but when I run the app everything is black, this does't happen with the normal FloatingActionButton so I guess maybe there's a compatibility problem? I'm new to coding so maybe I made a mistake in my code, I'll add the code here so you can try it and see if it works.
I'm sorry if there's some useless code there, as I said I'm new to coding and I'm trying a bunch of stuff, thanks.

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/painting.dart';
import 'package:flutter/rendering.dart';
import 'package:flutter/services.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:iziservicios/log_es.dart';
import 'package:iziservicios/perfil.dart';
import 'package:iziservicios/servicio.dart';
import 'package:animated_floatactionbuttons/animated_floatactionbuttons.dart';

class MainpageStateful extends StatefulWidget {
  @override
  Mainpage createState() => Mainpage();
}

class Mainpage extends State<MainpageStateful>{
  
  
  
  Widget comidas() {
    return Container(
      child: FloatingActionButton(
        onPressed: null,
        tooltip: 'Comidas',
        child: Icon(Icons.restaurant),
      ),
    );
}
Widget estetica() {
    return Container(
      child: FloatingActionButton(
        onPressed: null,
        tooltip: 'Estética',
        child: Icon(Icons.content_cut),
      ),
    );
}
Widget otros() {
    return Container(
      child: FloatingActionButton(
        onPressed: null,
        tooltip: 'Otros',
        child: Icon(Icons.more_horiz),
      ),
    );
}
  
  
  
  BuildContext _myContext;

Completer<GoogleMapController>_controller = Completer();

  @override
  
  Widget build(BuildContext context){
    _myContext = context;

List <Marker> _marcadores = [];

_marcadores.add(
  Marker(
  markerId: MarkerId('marker2'),
  position: LatLng(-32.311433, -58.094666),
  infoWindow: InfoWindow(
    title: 'Heladería',
    onTap: (){
        Navigator.push(
                    _myContext,
                MaterialPageRoute(builder: (context) => ServicioStateful()),
                );
    },
    ),
  icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueBlue),
),);
_marcadores.add(Marker(
  markerId: MarkerId('marker1'),
  position: LatLng(-32.3162695, -58.0949139),
  infoWindow: InfoWindow(
    title: 'Restaurante',
    onTap: () {
      //BuildContext context;
        Navigator.push(
                    context,
                MaterialPageRoute(builder: (context) => ServicioStateful()),
                );
    }),
  icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueBlue),
),);

    return new WillPopScope(
    onWillPop: () async => false,
    child: new Scaffold(
      appBar: AppBar(
        title: Text('IZIServicios'),
        backgroundColor: Colors.lightBlue,
        //automaticallyImplyLeading: false,
        //leading: Icon(Icons.menu),
      ),
      drawer: Drawer(
        child: ListView(
          padding: EdgeInsets.zero,
          children: <Widget>[
            DrawerHeader(
              child: Image.asset('assets/logoapp.png'),
              decoration: BoxDecoration(color: Colors.lightBlue, ),
            ),
/////////////////////////////////////////////////////////////////////////////////////
//cerrar sesión
/////////////////////////////////////////////////////////////////////////////////////
            Container(
              decoration: new BoxDecoration(
                        color: Color(0xFFcdcdcd),
                        border: Border(left: BorderSide(width: 5.0,color: Colors.lightBlue)),
                      ),
              child: ListTile(
              title: Text('Cerrar sesión'),
              onTap: () {
                Navigator.push(
                context,
                MaterialPageRoute(builder: (context) => LoginStateful()),
                );
                },
              ),
            ),
/////////////////////////////////////////////////////////////////////////////////////
//Perfil de usuario
/////////////////////////////////////////////////////////////////////////////////////
            Container(
              decoration: new BoxDecoration(
                        color: Color(0xFFcdcdcd),
                        border: Border(left: BorderSide(width: 5.0,color: Colors.lightBlue)),
                      ),
              child: ListTile(
              title: Text('Editar mi perfil'),
              onTap: () {
                Navigator.push(
                context,
                MaterialPageRoute(builder: (context) => EditarPerfilStateful()),
                );
                },
              ),
            ),
          ],
        ),
      ),
/////////////////////////////////////////////////////////////////////////////////////
//el body (mapa)
/////////////////////////////////////////////////////////////////////////////////////
     body: Stack(
       children: <Widget>[
         GoogleMap(
           onMapCreated: (GoogleMapController controller){
             _controller.complete(controller);
           },
           initialCameraPosition: CameraPosition(
             target: LatLng(-32.3069053, -58.0694765),//poner its como inicio
             zoom: 13.3,
           ),
           compassEnabled: true,
           mapType: MapType.normal,
           rotateGesturesEnabled: true,
           myLocationEnabled: true,
           scrollGesturesEnabled: true,
           zoomGesturesEnabled: true,
           markers: //{serviciodos}
           Set.from(_marcadores),
                    ),
                  ],
                ),
    floatingActionButton: AnimatedFloatingActionButton(
      fabButtons: <Widget>[
        comidas(), estetica(), otros()
      ],
      colorStartAnimation: Colors.lightBlue,
      colorEndAnimation: Colors.red,
      animatedIconData: AnimatedIcons.menu_close,
    ),
               ),
               );
             }
}```