Run error, didn't show picture and event Text!

[JackGujt]

I flutter run in iOS, and app run follow this:
1.Menu only display the Event text, no picture or nima/flare animationanimation
2.Timeline only display time, no event text or nima/flare animation.

run error:
Running Xcode build...
Xcode build done. 12.1s
Debug service listening on ws://127.0.0.1:57752/9_jc4moco2M=/ws
Syncing files to device iPhone 11 Pro...
[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: Unable to load asset: assets/Milky Way/Milky Way.flr
#0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)

#1 FlutterActor.loadFromBundle (package:flare_flutter/flare.dart:662:39)
#2 Timeline.loadFromBundle (package:timeline/timeline/timeline.dart:440:44)

#3 new BlocProvider (package:timeline/bloc_provider.dart:28:10)
#4 TimelineApp.build (package:timeline/main.dart:15:12)
#5 StatelessElement.build (package:flutter/src/widgets/framework.dart:4291:28)
#6 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4223:15)
#7 Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
#8 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
#9 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
#10 Element.inflateWidget (package:flutter/src/wi<…>
Application finished.