Socket.io client is getting disconnected just after connection in NestJS

import { Server, Socket } from 'socket.io';
import { Injectable } from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { User } from '../entities/user.entity';
import { Repository } from 'typeorm';
import { Messenger } from './entities/messenger.entity';

@Injectable()
@WebSocketGateway(5000)
export class MessengerGateway implements OnGatewayConnection, OnGatewayDisconnect, OnGatewayInit {
  constructor(
    @InjectRepository(User)
    private userRepository: Repository<User>,
    @InjectRepository(Messenger)
    private messageRepository: Repository<Messenger>,
  ) {}

  @SubscribeMessage('loadPeople')
  handleEvent(client: Socket, data){
    console.log(data);
    // this is not working
  }

  async afterInit(server: Server) {
    console.log('Init');
  }

  @SubscribeMessage('is-online')
  async handleConnection(client: Socket) {
    console.log('connected');
    // I can see this message in console
  }

  @SubscribeMessage('is-offline')
  async handleDisconnect(client: Socket) {
    console.log('disconnected');
     // I can see this message in console
  }
}

import { io } from "socket.io-client";
const  ENDPOINT = "localhost:5000";
let socket

function App(){
  useEffect(()=>{
          socket = io(ENDPOINT)
          socket.emit('loadPeople', {token: localStorage.token})
  },[])

  return (
  //...
  )
}