Wyjątek "insertEntrypointDefinition is not a function"

import { Module } from '@nestjs/common';
import {
  WebSocketGateway,
  WebSocketServer,
  MessageBody,
  SubscribeMessage,
} from '@nestjs/websockets';
import { Socket, Server } from 'socket.io';
@Module({
  providers: [
  ],
  imports: []
})
@WebSocketGateway()
export class WebsocketModule {
  constructor(
  ) { }
  @WebSocketServer()
  server: Server;



  @SubscribeMessage('send_message')
  async listenForMessages(@MessageBody() data: string) {
    this.server.sockets.emit('receive_message', data);
  }
}