Error: Unsupported operation: ServerSocket.bind

[zhuyonghao134123]

Error: Unsupported operation: ServerSocket.bind
at Object.throw_ [as throw] (http://localhost:50675/dart_sdk.js:4339:11)
at Function._bind (http://localhost:50675/dart_sdk.js:57307:17)
at Function.bind (http://localhost:50675/dart_sdk.js:57295:32)
at Function.bind (http://localhost:50675/dart_sdk.js:183998:30)
at Function.bind (http://localhost:50675/dart_sdk.js:177277:32)
at serve (http://localhost:50675/packages/shelf/src/io_server.dart.lib.js:130:70)
at serve.next ()
at runBody (http://localhost:50675/dart_sdk.js:37699:34)
at Object._async [as async] (http://localhost:50675/dart_sdk.js:37730:7)
at Object.serve (http://localhost:50675/packages/shelf/src/io_server.dart.lib.js:128:18)
at main$ (http://localhost:50675/packages/flutter_demo_vmcshop_app/main.dart.lib.js:461:36)
at main$.next ()
at runBody (http://localhost:50675/dart_sdk.js:37699:34)
at Object._async [as async] (http://localhost:50675/dart_sdk.js:37730:7)
at main$ (http://localhost:50675/packages/flutter_demo_vmcshop_app/main.dart.lib.js:460:18)
at main (http://localhost:50675/web_entrypoint.dart.lib.js:34:27)
at main.next ()
at http://localhost:50675/dart_sdk.js:37679:33
at _RootZone.runUnary (http://localhost:50675/dart_sdk.js:37533:58)
at _FutureListener.thenAwait.handleValue (http://localhost:50675/dart_sdk.js:32507:29)
at handleValueCallback (http://localhost:50675/dart_sdk.js:33054:49)
at Function._propagateToListeners (http://localhost:50675/dart_sdk.js:33092:17)
at async._AsyncCallbackEntry.new.callback (http://localhost:50675/dart_sdk.js:32818:27)
at Object._microtaskLoop (http://localhost:50675/dart_sdk.js:37794:13)
at _startMicrotaskLoop (http://localhost:50675/dart_sdk.js:37800:13)
at http://localhost:50675/dart_sdk.js:33309:9

[StarkZzzOoo]

me too