the loading indicator showing with message "please wait while the application is re-connecting

[Abdghali13]

I have an issue with running the flet package on Flutter app ,Although the python script is running on the same port .
any help with that ?

Restarted application in 3,774ms.
flutter: Page build: page
flutter: Page theme: ThemeMode.system
flutter: Page fonts build: page
flutter: MeterialApp.router build: page
flutter: currentConfiguration
flutter: Page navigator build: page
flutter: _buildNavigator build
flutter: Page media build
flutter: New page size: Size(393.0, 852.0)
flutter: Page brightness did not change.
flutter: Route changed to: /
flutter: Registering web client with route: /
flutter: currentConfiguration
flutter: Connecting to Flet server http://localhost:8550...
flutter: Connecting to WebSocket server ws://localhost:8550/ws...
flutter: currentConfiguration
flutter: registerWebClientInternal
flutter: Page build: page
flutter: Page theme: ThemeMode.system
flutter: Page fonts build: page
flutter: MeterialApp.router build: page
flutter: Page navigator build: page
flutter: _buildNavigator build
flutter: Page size did not change.
flutter: Page brightness did not change.
[VERBOSE-2:dart_vm_initializer.cc(41)] Unhandled Exception: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53374
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:694:35)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1855:26)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23)
#3 Socket._startConnect (dart:io-patch/socket_patch.dart:2078:22)
#4 Socket.startConnect (dart:io/socket.dart:763:21)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2466:20)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2906:12)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:2911:12)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:2766:12)
#9 _HttpClient.openUrl (dart:_http/http_impl.dart:2604:7)
#10 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1021:42)
#11 WebSocket.connect (dart:_http/websocket.dart:320:22)
#12 new<…>
flutter: WebSocket stream error WebSocketChannelException: WebSocketChannelException: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53374
flutter: WebSocket stream closed
flutter: Reconnect in 1 seconds
flutter: Page build: page
flutter: Page theme: ThemeMode.system
flutter: Page fonts build: page
flutter: MeterialApp.router build: page
flutter: Page navigator build: page
flutter: _buildNavigator build
flutter: Connecting to Flet server http://localhost:8550...
flutter: Connecting to WebSocket server ws://localhost:8550/ws...
flutter: registerWebClientInternal
[VERBOSE-2:dart_vm_initializer.cc(41)] Unhandled Exception: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53391
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:694:35)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1855:26)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23)
#3 Socket._startConnect (dart:io-patch/socket_patch.dart:2078:22)
#4 Socket.startConnect (dart:io/socket.dart:763:21)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2466:20)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2906:12)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:2911:12)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:2766:12)
#9 _HttpClient.openUrl (dart:_http/http_impl.dart:2604:7)
#10 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1021:42)
#11 WebSocket.connect (dart:_http/websocket.dart:320:22)
#12 new<…>
flutter: WebSocket stream error WebSocketChannelException: WebSocketChannelException: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53391
flutter: WebSocket stream closed
flutter: Reconnect in 1 seconds
flutter: Connecting to Flet server http://localhost:8550...
flutter: Connecting to WebSocket server ws://localhost:8550/ws...
flutter: registerWebClientInternal
[VERBOSE-2:dart_vm_initializer.cc(41)] Unhandled Exception: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53407
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:694:35)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1855:26)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23)
#3 Socket._startConnect (dart:io-patch/socket_patch.dart:2078:22)
#4 Socket.startConnect (dart:io/socket.dart:763:21)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2466:20)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2906:12)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:2911:12)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:2766:12)
#9 _HttpClient.openUrl (dart:_http/http_impl.dart:2604:7)
#10 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1021:42)
#11 WebSocket.connect (dart:_http/websocket.dart:320:22)
#12 new<…>
flutter: WebSocket stream error WebSocketChannelException: WebSocketChannelException: SocketException: Connection refused (OS Error: Connection refused, errno = 61), address = localhost, port = 53407
flutter: WebSocket stream closed
flutter: Reconnect in 1 seconds
flutter: Connecting to Flet server http://localhost:8550...
flutter: Connecting to WebSocket server ws://localhost:8550/ws...
flutter: registerWebClientInternal

[moluopro]

Me too !!! And the code in the documentation of https://pub.dev/packages/flet is also obsolete, the constructor of the FletApp class is missing the assetsDir parameter.

[FeodorFitsner]

Are you able to open http://localhost:8550 in the browser?

[larsien]

is it resolved? I encountered same issue. cannot run sample app in flutter with that error message

[larsien]

Are you able to open http://localhost:8550 in the browser?

I tried to connect to "http://localhost:8550" on browser in android/web environment.
but it failed to connect both

[larsien]

and this is my error log

E/flutter ( 7429): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 39626
E/flutter ( 7429): #0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:719:35)
E/flutter ( 7429): #1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1877:26)
E/flutter ( 7429): #2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23)
E/flutter ( 7429): #3 Socket._startConnect (dart:io-patch/socket_patch.dart:2100:22)
E/flutter ( 7429): #4 Socket.startConnect (dart:io/socket.dart:766:21)
E/flutter ( 7429): #5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2486:20)
E/flutter ( 7429): #6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2924:12)
E/flutter ( 7429): #7 _HttpClient._getConnection (dart:_http/http_impl.dart:2929:12)
E/flutter ( 7429): #8 _HttpClient._openUrl (dart:_http/http_impl.dart:2784:12)
E/flutter ( 7429): #9 _HttpClient.openUrl (dart:_http/http_impl.dart:2622:7)
E/flutter ( 7429): #10 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1021:42)
E/flutter ( 7429): #11 WebSocket.connect (dart:_http/websocket.dart:320:22)
E/flutter ( 7429): #12 new IOWebSocketChannel.connect (package:web_socket_channel/io.dart:81:28)
E/flutter ( 7429): #13 connect (package:web_socket_channel/src/_connect_io.dart:15:24)
E/flutter ( 7429): #14 new WebSocketChannel.connect (package:web_socket_channel/src/channel.dart:115:16)
E/flutter ( 7429): #15 FletWebSocketServerProtocol.connect (package:flet/src/flet_server_protocol_web_socket.dart:40:35)
E/flutter ( 7429):
E/flutter ( 7429): #16 FletServer.connect (package:flet/src/flet_server.dart:65:7)
E/flutter ( 7429):
E/flutter ( 7429): #17 FletServer._onDisconnect. (package:flet/src/flet_server.dart:100:9)