Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 37198

catch error in every try to connect

Unhandled Exception: SocketException: Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 37198 E/flutter (30517): #0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:719:35) E/flutter (30517): #1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1877:26) E/flutter (30517): #2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23) E/flutter (30517): #3 Socket._startConnect (dart:io-patch/socket_patch.dart:2100:22) E/flutter (30517): #4 Socket.startConnect (dart:io/socket.dart:766:21) E/flutter (30517): #5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2486:20) E/flutter (30517): #6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2924:12) E/flutter (30517): #7 _HttpClient._getConnection (dart:_http/http_impl.dart:2929:12) E/flutter (30517): #8 _HttpClient._openUrl (dart:_http/http_impl.dart:2784:12) E/flutter (30517): #9 _HttpClient.openUrl (dart:_http/http_impl.dart:2622:7) E/flutter (30517): #10 _WebSocketImpl.connect (dart:_http/websocket_impl.dart:1021:42) E/flutter (30517): #11 WebSocket.connect (dart:_http/websocket.dart:320:22) E/flutter (30517): #12 IoSocketPlatform.webSocket (package:socketcluster_client/src/socket_platform_io.dart:10:51) E/flutter (30517): #13 Socket.connect (package:socketcluster_client/src/socket.dart:48:47) E/flutter (30517): #14 SocketClusterWrapper.connect (package:redux_remote_devtools/src/socketcluster_wrapper.dart:12:34) E/flutter (30517): #15 RemoteDevToolsMiddleware.connect (package:redux_remote_devtools/src/remote_devtools_middleware.dart:63:18) E/flutter (30517): #16 createStore (package:ZB/store.dart:29:24) E/flutter (30517): #17 main (package:ZB/main.dart:104:23) E/flutter (30517): <asynchronous suspension>

pauldemarco / socketcluster_client

Connection refused (OS Error: Connection refused, errno = 111), address = localhost, port = 37198 #17