I’m working on a Flutter project. I’ve been stuck on this error for 72 hours. Could someone please help me? Here is my main.dart file.

void main() async{
  WidgetsFlutterBinding.ensureInitialized();
  

  await Firebase.initializeApp(
    options: DefaultFirebaseOptions.currentPlatform,
  );

  FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

   runApp(MyApp());
}

While running it, here is the error I obtained :
ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: PlatformException(channel-error, Unable to establish connection on channel., null, null)