flutter build web

#0      _Directory._deleteSync (dart:io/directory_impl.dart:201:7)
#1      FileSystemEntity.deleteSync (dart:io/file_system_entity.dart:455:47)
#2      ForwardingFileSystemEntity.deleteSync (package:file/src/forwarding/forwarding_file_system_entity.dart:72:16)
#3      ErrorHandlingDirectory.deleteSync.<anonymous closure> (package:flutter_tools/src/base/error_handling_io.dart:389:22)
#4      _runSync (package:flutter_tools/src/base/error_handling_io.dart:486:14)
#5      ErrorHandlingDirectory.deleteSync (package:flutter_tools/src/base/error_handling_io.dart:388:12)
#6      buildWeb (package:flutter_tools/src/web/compile.dart:41:21)
<asynchronous suspension>
#7      BuildWebCommand.runCommand (package:flutter_tools/src/commands/build_web.dart:91:11)
#8      FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1005:18)
#9      _rootRunUnary (dart:async/zone.dart:1198:47)
#10     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#11     _FutureListener.handleValue (dart:async/future_impl.dart:143:18)
#12     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45)
#13     Future._propagateToListeners (dart:async/future_impl.dart:725:32)
#14     Future._completeWithValue (dart:async/future_impl.dart:529:5)
#15     Future._asyncCompleteWithValue.<anonymous closure> (dart:async/future_impl.dart:567:7)
#16     _rootRun (dart:async/zone.dart:1190:13)
#17     _CustomZone.run (dart:async/zone.dart:1093:19)
#18     _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#19     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
#20     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#21     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#22     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
#23     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5)

[✓] Flutter (Channel dev, 1.23.0-18.0.pre, on Microsoft Windows [Version 6.1.7601], locale en-US)
    • Flutter version 1.23.0-18.0.pre at C:\flutter
    • Framework revision 37ebe3d82a (2 weeks ago), 2020-10-13 10:52:23 -0700
    • Engine revision 6634406889
    • Dart version 2.11.0 (build 2.11.0-213.0.dev)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at C:\Users\Qursana\AppData\Local\Android\sdk
    • Platform android-29, build-tools 29.0.2
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[✓] Chrome - develop for the web
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[!] Visual Studio - develop for Windows (Visual Studio Community 2019 16.7.6)
    • Visual Studio at C:\Program Files (x86)\Microsoft Visual Studio\2019\Community
    • Visual Studio Community 2019 version 16.7.30611.23
    ✗ The current Visual Studio installation is incomplete. Please reinstall Visual Studio.

[✓] Android Studio (version 4.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 50.0.1
    • Dart plugin version 193.7547
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[✓] VS Code (version 1.50.0)
    • VS Code at C:\Users\Qursana\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension can be installed from:
      🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter

[✓] Connected device (5 available)
    • LG K430 (mobile)  • LGK430YLDAW8QG • android-arm    • Android 6.0 (API 23)
    • Windows (desktop) • windows        • windows-x64    • Microsoft Windows [Version 6.1.7601]
    • Web Server (web)  • web-server     • web-javascript • Flutter Tools
    • Chrome (web)      • chrome         • web-javascript • Google Chrome 86.0.4240.111
    • Edge (web)        • edge           • web-javascript • Microsoft Edge 86.0.622.38

! Doctor found issues in 1 category.