我特灵实现云Firestore到我的笔记程序，但我不断得到这个错误两次：
I/扑动（5328）：（未在通道plugins.flutter.io/firebase_core上找到方法Firebase#initializeCore的实现）〉I/flutter（5328）：未找到通道plugins.flutter.io/firebase_core上的方法Firebase#initializeCore的实现）
我已经尝试了所有其他补救措施从其他类似的网页，但没有一个工作。这是我的main.dart：

//imports like material and cupertino above
import 'package:cloud_firestore/cloud_firestore.dart';

// Import the firebase_core plugin
import 'package:firebase_core/firebase_core.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(MaterialApp(home: App(),));
}

class App extends StatefulWidget {
  _AppState createState() => _AppState();
}

class _AppState extends State<App> {
  // Set default `_initialized` and `_error` state to false
  bool _initialized = false;
  bool _error = false;
  String error = '';

  // Define an async function to initialize FlutterFire
  void initializeFlutterFire() async {
    try {
      // Wait for Firebase to initialize and set `_initialized` state to true
      await Firebase.initializeApp();
      setState(() {
        _initialized = true;
      });
    } catch(e) {
      // Set `_error` state to true if Firebase initialization fails
      setState(() {
        error = e.toString();
        _error = true;
      });
    }
  }

  @override
  void initState() {
    initializeFlutterFire();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    // Show error message if initialization failed
    if(_error) {
      print(error);
      return Scaffold(
        body: Container(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Text(
                '${error}'
              ),
            ],
          ),
        ),
      );
    }

    // Show a loader until FlutterFire is initialized
    if (!_initialized) {
      return Scaffold(
        body: Container(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              CircularProgressIndicator()
            ],
          ),
        ),
      );;
    }

    return NoteApp();
  }
}

class NoteApp extends StatefulWidget {
  const NoteApp({Key? key}) : super(key: key);

  @override
  _NoteAppState createState() => _NoteAppState();
}

class _NoteAppState extends State<NoteApp> {
...
  }

这是我的酒吧说明书

dependencies:

  cloud_firestore_platform_interface: ^5.4.1
  cloud_firestore_web: ^2.4.1
  cloud_firestore: ^2.5.1
  collection: ^1.0.0
  firebase_core: ^1.6.0
  firebase_core_platform_interface: ^4.0.1

这是我的身材

buildTypes {
        release {
            signingConfig signingConfigs.debug
            minifyEnabled false
            shrinkResources false
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
        }
        defaultConfig{
// add the following line
            multiDexEnabled true
        }
    }

有没有人知道如何解决这个不像其他问题？