can't create room

I used pun2.4.1, and I ran this program. It does not output "JoinedRoom" after outputting "Connected".

using Photon.Pun;

using Photon.Realtime;

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.SceneManagement;

public class _TestPhoton : MonoBehaviourPunCallbacks {

  // Start is called before the first frame update

  void Start()

  {

    PhotonNetwork.ConnectUsingSettings();

  }

  public override void OnConnectedToMaster() {

    base.OnConnectedToMaster();

    Debug.Log("ConnectedToMaster");

    Debug.Log(PhotonNetwork.JoinOrCreateRoom("room", new RoomOptions() { MaxPlayers = 14 }, default));

  }

  public override void OnJoinedRoom() {

    base.OnJoinedRoom();

    Debug.Log("JoinedRoom");

  }

}