我正在为自己构建一些内部工具，使用我设置的一些模板沿着一些可以在应用程序之间共享的附加功能来生成Flutter应用程序。
目前，代码编译，构建和部署都很好，但它在第一个视图（空白的白色屏幕）上卡住了，并在失败之前重试启动Observatory服务器11次。除了下面的错误之外，没有其他错误。

Launching lib\main.dart on Android SDK built for x86 in debug mode...
Built build\app\outputs\apk\debug\app-debug.apk.
I/flutter ( 7011): Observatory server failed to start after 1 tries
I/flutter ( 7011): Observatory server failed to start after 2 tries
I/flutter ( 7011): Observatory server failed to start after 3 tries
I/flutter ( 7011): Observatory server failed to start after 4 tries
I/flutter ( 7011): Observatory server failed to start after 5 tries
I/flutter ( 7011): Observatory server failed to start after 6 tries
I/flutter ( 7011): Observatory server failed to start after 7 tries
I/flutter ( 7011): Observatory server failed to start after 8 tries
I/flutter ( 7011): Observatory server failed to start after 9 tries
I/flutter ( 7011): Observatory server failed to start after 10 tries
I/flutter ( 7011): Observatory server failed to start after 11 tries
I/flutter ( 7011): Could not start Observatory HTTP server:
I/flutter ( 7011): SocketException: Failed to create server socket (OS Error: Permission denied, errno = 13), address = 127.0.0.1, port = 0
I/flutter ( 7011): #0      _NativeSocket.bind (dart:io/runtime/bin/socket_patch.dart:591:7)
I/flutter ( 7011): <asynchronous suspension>
I/flutter ( 7011): #1      _RawServerSocket.bind (dart:io/runtime/bin/socket_patch.dart:1206:26)
I/flutter ( 7011): #2      _ServerSocket.bind (dart:io/runtime/bin/socket_patch.dart:1466:29)
I/flutter ( 7011): #3      ServerSocket.bind (dart:io/runtime/bin/socket_patch.dart:1457:26)
I/flutter ( 7011): #4      _HttpServer.bind (dart:_http/http_impl.dart:2520:25)
I/flutter ( 7011): #5      HttpServer.bind (dart:_http/http.dart:227:19)
I/flutter ( 7011): #6      Server.startup.poll (dart:vmservice_io/server.dart:355:36)
I/flutter ( 7011): <asynchronous suspension>
I/flutter ( 7011): #7      Server.startup (dart:vmservice_io/server.dart:367:23)
I/flutter ( 7011): <asynchronous suspension>
I/flutter ( 7011): #8      main (dart:vmservice_io/vmservice_io.dart:253:12)
I/flutter ( 7011):

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我的问题是

• 我该如何调试这个问题？
• 你知道是什么导致的吗？

代码看起来与我正在使用的模板相同（可以工作），唯一的区别是包名称不同。

编辑1

Here是挂起以进行复制的项目的链接。