[Firebase Messaging] type 'Null' is not a subtype of type 'bool'

[HedgeHao]

I'm using firebase_analytics 7.1.1. Testing on Android 10 emulator. While receiving notification in background getting this error type 'Null' is not a subtype of type 'bool'

Here's part of the code.

Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();
  print("Handling a background message: ${message.messageId}");
}

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);
  runApp(MyApp());
}

flutter doctor

[✓] Flutter (Channel master, 2.1.0-13.0.pre.104, on Linux, locale en_US.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
[✓] Chrome - develop for the web
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 4.1)
[✓] VS Code (version 1.54.1)
[✓] Connected device (3 available)

• No issues found!

Message content

{
    "to": "....",
    "data": {
        "title": "mytitle",
        "body": "mybody",
        "url": "myurl"
    },
    "click_action": "FLUTTER_NOTIFICATION_CLICK"
}

And the log

D/FLTFireMsgReceiver( 5889): broadcast received for message
I/flutter ( 5889): FlutterFire Messaging: An error occurred in your background messaging handler:
I/flutter ( 5889): type 'Null' is not a subtype of type 'bool'

Please help!