Getting Error when running the firestore example

[arrrrny]

Future<void> main(List<String> args) async {
  Log.level = LogLevel.w;
  final FirebaseOptions options = FirebaseOptions(
    apiKey: "AIzaSyB*******",
    projectId: "********",
    storageBucket: "*****810.appspot.com",
    applicationId: '1:****:web:31666888a0e4****264f1',
    databaseUrl: 'https://******0.firebaseio.com',
    gcmSenderId: '********',
  );
  final FirebaseApp app =
      FirebaseApp.withOptions(options, ServiceCredential('token.dat'), checkConnection, "Angel");
  final FirebaseFirestore firestore =
      await FirebaseFirestore.getInstance(app, openDatabase: DatabaseMock.create);
  firestore.collection('price').document('1000').get().then((DocumentSnapshot ds) {
    print(ds.data);
  });
  // print(firestore.document('/price/1000').snapshots.first.toString());
}

Future<bool> checkConnection() async => true;

main.dart: Warning: Interpreting this as package URI, 'package:vm_example/main.dart'.
null
Unhandled exception:
FirebaseFirestoreError:unavailable Failed to get document because the client is offline. null null
#0      DocumentReference._getViaSnapshotListener.<anonymous closure> (package:firebase_firestore/src/firebase/firestore/document_reference.dart:191:9)
#1      _MapStream._handleData (dart:async/stream_pipe.dart:227:21)
#2      _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#3      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#4      _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#5      _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#6      _ForwardingStreamSubscription._add (dart:async/stream_pipe.dart:132:11)
#7      _MapStream._handleData (dart:async/stream_pipe.dart:232:10)
#8      _ForwardingStreamSubscription._handleData (dart:async/stream_pipe.dart:164:13)
#9      _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#10     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#11     _BufferingStreamSubscription._add (dart:async/stream_impl.dart:263:7)
#12     _SyncStreamControllerDispatch._sendData (dart:async/stream_controller.dart:764:19)
#13     _StreamController._add (dart:async/stream_controller.dart:640:7)
#14     _StreamController.add (dart:async/stream_controller.dart:586:5)
#15     _RootZone.runUnaryGuarded (dart:async/zone.dart:1314:10)
#16     _BufferingStreamSubscription._sendData (dart:async/stream_impl.dart:336:11)
#17     _DelayedData.perform (dart:async/stream_impl.dart:591:14)
#18     _StreamImplEvents.handleNext (dart:async/stream_impl.dart:707:11)
#19     _PendingEvents.schedule.<anonymous closure> (dart:async/stream_impl.dart:667:7)
#20     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#21     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#22     _Timer._runTimers (dart:isolate-patch/timer_impl.dart:391:30)
#23     _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:416:5)
#24     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)

[long1eu]

This should be fixed now