Flutter 颤振插座连接故障

大家好，为什么我不能发短信？当我连接到https服务器时，我会收到“已连接”消息，但我无法收到发送消息，请帮助他人

import 'dart:developer';

import 'package:socket_io_client/socket_io_client.dart' as IO;
main() async{
  // Dart client
  IO.Socket socket = IO.io('https://laravel.init.kz:3404/');
  socket.onConnect((_) {
    print('connect');
    socket.emit('msg123', 'test');
  });
  socket.on('event', (data) => log(data));
  socket.onDisconnect((_) => print('disconnect'));
  socket.on('fromServer', (_) => print(_));
  socket.connect();