LOAD LEVEL

Hi,what I want to do is, when the room reaches a certain number,he chooses one of the several maps and opens it, when I do it, he just Decodes the room  the map is created for the player and it is not created for the other player.

the software I use;

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Photon.Realtime;
using Photon.Pun;
using UnityEngine.SceneManagement;



   
  public class online : MonoBehaviourPunCallbacks
  {
  private int randomMap;
    private void Awake()
    {
      PhotonNetwork.AutomaticallySyncScene = true;
    }
    void Start()
    {
      PhotonNetwork.ConnectUsingSettings();
    }
    public override void OnConnectedToMaster()
    {
      base.OnConnectedToMaster();
      PhotonNetwork.JoinLobby();
    }
    public override void OnJoinedLobby()
    {
      PhotonNetwork.JoinOrCreateRoom("room", new RoomOptions { MaxPlayers = 20, IsOpen = true, IsVisible = false }, TypedLobby.Default);
      base.OnJoinedLobby();
    }

    public override void OnJoinedRoom()
    {
      spawn();
    if (PhotonNetwork.CountOfPlayers == 20)
    {
      randomMap = Random.Range(1, 10);

      if (randomMap == 1)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 2)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 3)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 4)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 5)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 5)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 6)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 7)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 8)
      {
        PhotonNetwork.LoadLevel("Name from map");

      }
      if (randomMap == 9)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }
      if (randomMap == 10)
      {
        PhotonNetwork.LoadLevel("Name from map");
      }

    }
    }

    public void spawn()
    {
      PhotonNetwork.Instantiate("car", Vector3.zero, Quaternion.identity, 0, null);
    }

  }

I would appreciate it if you could tell me what I did wrong, thank you