why does flutter desktop-embedding throw an error on build? - flutter

Question

I want to run my existing flutter app on windows, so I loaded the lastest flutter-desktop-embedding version, placed my code inside and tried to run it. It soon breaks with an exception:
Build process failed. To view the stack trace, please run `flutter run -d windows -v`.
#0 throwToolExit (package:flutter_tools/src/base/common.dart:28:3)
#1 buildWindows (package:flutter_tools/src/windows/build_windows.dart:82:5)
<asynchronous suspension>
#2 WindowsDevice.buildForDevice (package:flutter_tools/src/windows/windows_device.dart:46:11)
#3 DesktopDevice.startApp (package:flutter_tools/src/desktop_device.dart:87:13)
<asynchronous suspension>
#4 FlutterDevice.runHot (package:flutter_tools/src/resident_runner.dart:416:54)
<asynchronous suspension>
#5 HotRunner.run (package:flutter_tools/src/run_hot.dart:266:39)
<asynchronous suspension>
#6 RunCommand.runCommand (package:flutter_tools/src/commands/run.dart:499:37)
<asynchronous suspension>
#7 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:570:18)
#8 _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:71:64)
#9 _rootRunUnary (dart:async/zone.dart:1132:38)
#10 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#11 _FutureListener.handleValue (dart:async/future_impl.dart:137:18)
#12 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:678:45)
#13 Future._propagateToListeners (dart:async/future_impl.dart:707:32)
#14 Future._completeWithValue (dart:async/future_impl.dart:522:5)
#15 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:30:15)
#16 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:288:13)
#17 RunCommand.usageValues (package:flutter_tools/src/commands/run.dart)
#18 _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:71:64)
#19 _rootRunUnary (dart:async/zone.dart:1132:38)
#20 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#21 _FutureListener.handleValue (dart:async/future_impl.dart:137:18)
#22 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:678:45)
#23 Future._propagateToListeners (dart:async/future_impl.dart:707:32)
#24 Future._completeWithValue (dart:async/future_impl.dart:522:5)
#25 _AsyncAwaitCompleter.complete (dart:async-patch/async_patch.dart:30:15)
#26 _completeOnAsyncReturn (dart:async-patch/async_patch.dart:288:13)
#27 IosProject.isSwift (package:flutter_tools/src/project.dart)
#28 _asyncThenWrapperHelper.<anonymous closure> (dart:async-patch/async_patch.dart:71:64)
#29 _rootRunUnary (dart:async/zone.dart:1132:38)
#30 _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#31 _FutureListener.handleValue (dart:async/future_impl.dart:137:18)
#32 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:678:45)
#33 Future._propagateToListeners (dart:async/future_impl.dart:707:32)
#34 Future._completeWithValue (dart:async/future_impl.dart:522:5)
#35 Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:552:7)
#36 _rootRun (dart:async/zone.dart:1124:13)
#37 _CustomZone.run (dart:async/zone.dart:1021:19)
#38 _CustomZone.runGuarded (dart:async/zone.dart:923:7)
#39 _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:963:23)
#40 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#41 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#42 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:116:13)
#43 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:173:5)
I am developing on the master channel, already made flutter upgrade and else I think i did everything else I need to do. Running the example comming with flutter-desktop-embedding does not throw any exception, and it seems that if I copy my lib folder into the examples folder, the app will not build.
Does anyone face this issue too?

Answer 1

This problem is due Flutter Version to Solve it
Open Terminal and Write flutter upgrade --force
Open Your Windows Flutter Project and Write flutter run