[google_maps_flutter]

[imeDevelopers]

I just launched the application:

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
The following NoSuchMethodError was thrown building _BodyBuilder:
The method 'map' was called on null.
Receiver: null
Tried calling: map<MapEntry<MapsObjectId, Marker>>(Closure: (Marker) =>
MapEntry<MapsObjectId, Marker>)

                The relevant error-causing widget was:
                  Scaffold-[LabeledGlobalKey<ScaffoldState>#49800] file:///myapp/lib/any.dart:1586:1

                When the exception was thrown, this was the stack:
                #0      Object.noSuchMethod (dart:core-patch/object_patch.dart:54:5)
                #1      keyByMapsObjectId (package:google_maps_flutter_platform_interface/src/types/utils/maps_object.dart:10:54)
                #2      keyByMarkerId (package:google_maps_flutter_platform_interface/src/types/utils/marker.dart:10:10)
                #3      _GoogleMapState.initState (package:google_maps_flutter/src/google_map.dart:270:16)
                #4      StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4711:57)
                #5      ComponentElement.mount (package:flutter/src/widgets/framework.dart:4548:5)
                #6      Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
                #7      MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
                #8      MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
                ...     Normal element mounting (19 frames)
                #27     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
                #28     MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
                #29     MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
                ...     Normal element mounting (267 frames)
                #296    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
                #297    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
                #298    MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6232:32)
                ...     Normal element mounting (510 frames)
                #808    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3611:14)
                #809    MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6221:36)
                #810    Element.updateChild (package:flutter/src/widgets/framework.dart:3363:18)
                #811    RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5654:32)
                #812    MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6243:17)
                #813    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #814    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #815    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
                #816    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #817    StatefulElement.update (package:flutter/src/widgets/framework.dart:4778:5)
                #818    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #819    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #820    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #821    ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
                #822    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #823    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #824    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #825    ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
                #826    _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:181:11)
                #827    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #828    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
                #829    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #830    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #831    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
                #832    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #833    StatefulElement.update (package:flutter/src/widgets/framework.dart:4778:5)
                #834    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #835    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
                #836    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #837    SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6090:14)
                #838    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #839    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #840    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #841    ProxyElement.update (package:flutter/src/widgets/framework.dart:4922:5)
                #842    Element.updateChild (package:flutter/src/widgets/framework.dart:3350:15)
                #843    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4599:16)
                #844    StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4746:11)
                #845    Element.rebuild (package:flutter/src/widgets/framework.dart:4267:5)
                #846    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2582:33)
                #847    WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:875:21)
                #848    RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:328:5)
                #849    SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1144:15)
                #850    SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1082:9)
                #851    SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:998:5)
                #855    _invoke (dart:ui/hooks.dart:163:10)
                #856    PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:259:5)
                #857    _drawFrame (dart:ui/hooks.dart:126:31)
                (elided 3 frames from dart:async)

[imeDevelopers]

Changing C:\Users\MYUSER\AppData\Local\Pub\Cache\hosted\pub.dartlang.org\google_maps_flutter_platform_interface-2.0.4\lib\src\types\utils\maps_object.dart

From:

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '../maps_object.dart';

/// Converts an [Iterable] of [MapsObject]s in a Map of [MapObjectId] -> [MapObject].
Map<MapsObjectId<T>, T> keyByMapsObjectId<T extends MapsObject>(
    Iterable<T> objects) {
  return Map<MapsObjectId<T>, T>.fromEntries(objects.map((T object) =>
      MapEntry<MapsObjectId<T>, T>(
          object.mapsId as MapsObjectId<T>, object.clone())));
}

/// Converts a Set of [MapsObject]s into something serializable in JSON.
Object serializeMapsObjectSet(Set<MapsObject> mapsObjects) {
  return mapsObjects.map<Object>((MapsObject p) => p.toJson()).toList();
}

To:

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '../maps_object.dart';

/// Converts an [Iterable] of [MapsObject]s in a Map of [MapObjectId] -> [MapObject].
Map<MapsObjectId<T>, T> keyByMapsObjectId<T extends MapsObject>(
    Iterable<T> objects) {
  if(objects == null){return <MapsObjectId<T>, T>{};}
  return Map<MapsObjectId<T>, T>.fromEntries(objects.map((T object) =>
      MapEntry<MapsObjectId<T>, T>(
          object.mapsId as MapsObjectId<T>, object.clone())));
}

/// Converts a Set of [MapsObject]s into something serializable in JSON.
Object serializeMapsObjectSet(Set<MapsObject> mapsObjects) {
  if(mapsObjects == null){return [];}
  return mapsObjects.map<Object>((MapsObject p) => p.toJson()).toList();
}

SOLVED THE PROBLEM, YOU SHOULD UPDATE THIS FILE IN THE PLUGIN, THANKS.

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