Crash report not uploaded or received by Firebase server using Crashlytics

Question

Im trying to add flutter crashlytics to my app and have followed the official documentation and setup guides.

in my project level build.gradle Ive added:

dependencies {
        classpath 'com.android.tools.build:gradle:3.5.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.4'
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.3.0'
    }

and in my app level build.gradle Ive added:

apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.crashlytics'

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.firebase:firebase-analytics:17.5.0'
    // Add the Firebase Crashlytics SDK.
    implementation 'com.google.firebase:firebase-crashlytics:17.2.2'
}

Then in my main() Ive added the below:

FirebaseAnalytics analytics;

void main() async{
  //below will ensure initializations happen before calling runApp()
  WidgetsFlutterBinding.ensureInitialized();
  // this is needed for all firebase stuff from August 27, initialize at top
  await Firebase.initializeApp();
  Admob.initialize();
  FirebaseCrashlytics.instance.setCrashlyticsCollectionEnabled(true);
  // Pass all uncaught errors from the framework to Crashlytics.
  FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterError;
  runApp(MyApp());
}

And to force the crash to test, I used the below line in a onPressed function on another screen in my app.

FirebaseCrashlytics.instance.crash();

This is the log on crash:

D/AndroidRuntime(19056): Shutting down VM
E/AndroidRuntime(19056): FATAL EXCEPTION: main
E/AndroidRuntime(19056): Process: com.my_company.my_app, PID: 19056
E/AndroidRuntime(19056): io.flutter.plugins.firebase.crashlytics.FirebaseCrashlyticsTestCrash: This is a test crash caused by calling .crash() in Dart.
E/AndroidRuntime(19056):    at io.flutter.plugins.firebase.crashlytics.FlutterFirebaseCrashlyticsPlugin.lambda$crash$1(FlutterFirebaseCrashlyticsPlugin.java:81)
E/AndroidRuntime(19056):    at io.flutter.plugins.firebase.crashlytics.-$$Lambda$FlutterFirebaseCrashlyticsPlugin$H0t0BleSpjDMVvqpx8Hy-ZKGwP8.run(Unknown Source:0)
E/AndroidRuntime(19056):    at android.os.Handler.handleCallback(Handler.java:938)
E/AndroidRuntime(19056):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime(19056):    at android.os.Looper.loop(Looper.java:223)
E/AndroidRuntime(19056):    at android.app.ActivityThread.main(ActivityThread.java:7656)
E/AndroidRuntime(19056):    at java.lang.reflect.Method.invoke(Native Method)
E/AndroidRuntime(19056):    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
E/AndroidRuntime(19056):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
I/Process (19056): Sending signal. PID: 19056 SIG: 9
Lost connection to device.

Which looks like it is crashing as expected but at the firebase website I am stuck at the following:

I know that the app has to restart to send the report and I have restarted my app many times after crash, but still nothing is received by firebase,

what am I doing wrong?