🐛 | Exception caught by Flutter framework | - when run Example on Web

[thegioiso]

Describe the bug
I have cloned the project and try to run Example folder as below:

Using Chrome

No problem here:

And then...

The project has show up well, everything fine here.

BUT... an error has show up on debug console:

════════ Exception caught by Flutter framework ═════════════════════════════════
The following assertion was thrown during a service extension callback for "ext.flutter.inspector.getRootWidgetSummaryTreeWithPreviews":
Assertion failed:
D:\…\foundation\diagnostics.dart:2137
ifTrue != null || ifFalse != null
is not true

Full error log

Launching lib\main.dart on Chrome in debug mode...
This app is linked to the debug service: ws://127.0.0.1:64672/BascOyMLnns=/ws
Debug service listening on ws://127.0.0.1:64672/BascOyMLnns=/ws
 Running with sound null safety
Connecting to VM Service at ws://127.0.0.1:64672/BascOyMLnns=/ws
Flutter Web Bootstrap: Auto

════════ Exception caught by Flutter framework ═════════════════════════════════
The following assertion was thrown during a service extension callback for "ext.flutter.inspector.getRootWidgetSummaryTreeWithPreviews":
Assertion failed:
ifTrue != null || ifFalse != null
is not true


When the exception was thrown, this was the stack
dart:sdk_internal 5241:11                                   throw_
dart:sdk_internal 5159:15                                   assertFailed
packages/flutter/src/foundation/debug.dart.lib.js 2390:52   new
packages/fluent_ui/src/utils/popup.dart.lib.js 33729:17     <fn>
packages/fluent_ui/src/utils/popup.dart.lib.js 33733:9      debugFillProperties
packages/flutter/src/widgets/title.dart.lib.js 25336:34     debugFillProperties
packages/flutter/src/foundation/debug.dart.lib.js 2709:26   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 2712:30   get builder
packages/flutter/src/foundation/debug.dart.lib.js 2722:58   get emptyBodyDescription
packages/flutter/src/foundation/debug.dart.lib.js 1512:20   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/foundation/debug.dart.lib.js 1539:77   <fn>
dart:sdk_internal 24563:25                                  elementAt
dart:sdk_internal 24352:55                                  moveNext
dart:sdk_internal 7061:21                                   next
dart:sdk_internal 46765:18                                  of
dart:sdk_internal 24159:30                                  toList
packages/flutter/src/foundation/debug.dart.lib.js 1539:172  toJsonList
packages/flutter/src/foundation/debug.dart.lib.js 1521:93   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1523:11   <fn>
packages/flutter/src/foundation/debug.dart.lib.js 1525:26   toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 61796:24     toJsonMap
packages/flutter/src/widgets/title.dart.lib.js 27268:39     [_nodeToJson]
%3Canonymous%3E 69:49                                       getRootWidgetSummaryTreeWithPreviews
packages/flutter/src/foundation/binding.dart.lib.js 323:30  <fn>
dart:sdk_internal 40576:33                                  <fn>
dart:sdk_internal 40410:59                                  runUnary
dart:sdk_internal 35624:29                                  handleValue
dart:sdk_internal 36185:49                                  handleValueCallback
dart:sdk_internal 36223:17                                  _propagateToListeners
dart:sdk_internal 36050:25                                  [_complete]
dart:sdk_internal 35180:30                                  <fn>
dart:sdk_internal 26873:11                                  internalCallback
════════════════════════════════════════════════════════════════════════════════

My flutter doctor -v:

[√] Flutter (Channel stable, 3.3.8, on Microsoft Windows [Version 10.0.19044.2251], locale en-US)
    • Flutter version 3.3.8 on channel stable at D:\sdk\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 52b3dc25f6 (12 days ago), 2022-11-09 12:09:26 +0800
    • Engine revision 857bd6b74c
    • Dart version 2.18.4
    • DevTools version 2.15.0

[√] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
    • Android SDK at C:\Users\NPH\AppData\Local\Android\sdk
    • Platform android-33, build-tools 32.1.0-rc1
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 11.0.12+7-b1504.28-7817840)   
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files\Google\Chrome\Application\chrome.exe

[X] Visual Studio - develop for Windows
    X Visual Studio not installed; this is necessary for Windows development.
      Download at https://visualstudio.microsoft.com/downloads/.
      Please install the "Desktop development with C++" workload, including all of its default components

[√] Android Studio (version 2021.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 11.0.12+7-b1504.28-7817840)

[√] VS Code (version 1.70.0)
    • VS Code at C:\Users\NPH\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.52.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [Version 10.0.19044.2251]
    • Chrome (web)      • chrome  • web-javascript • Google Chrome 107.0.5304.107
    • Edge (web)        • edge    • web-javascript • Microsoft Edge 107.0.1418.35

[√] HTTP Host Availability
    • All required HTTP hosts are available

The Example works fine but this error has confused me. Please help...

Thank you all so much.