firebase_crashlytics integration with flutter is not working stuck at We'll be listening for your app to communicate with our servers

i am trying to implement https://pub.dev/packages/firebase_crashlytics plugin for my flutter app.

i followed every step given in https://pub.dev/packages/firebase_crashlytics plugin but got stuck at firebase console page where it says We'll be listening for your app to communicate with our servers.

this is my initialization

void main(){
  Crashlytics.instance.enableInDevMode = true;
  FlutterError.onError = Crashlytics.instance.recordFlutterError;
  runApp(MyApp());
}

and i am forcing app crash on click of button like

Crashlytics.instance.crash();

when i click on button i can see log in debug console

flutter: firebase_crashlytics: Error reported to Crashlytics.

but firebase console not showing any logs and stuck at above mentioned page. can someone help please.