question

I don't know what's wrong, it seems that PlayFabMultiplayerAPI.RequestMultiplayerServer returns null, note that I already fill the build ID, My build status on playfab is deployed, and I already set the region to NorthEurope (same with the build VM region configuration)

Here are the codes:

private void RequestMultiplayerServer()
    {
        Debug.Log("[ClientStartUp].RequestMultiplayerServer");
        RequestMultiplayerServerRequest requestData = new RequestMultiplayerServerRequest();
        requestData.BuildId = configuration.buildId;
        requestData.SessionId = System.Guid.NewGuid().ToString();
        requestData.PreferredRegions = new List<AzureRegion>() { AzureRegion.NorthEurope};
        PlayFabMultiplayerAPI.RequestMultiplayerServer(requestData, OnRequestMultiplayerServer, OnRequestMultiplayerServerError);
    }

    private void OnRequestMultiplayerServer(RequestMultiplayerServerResponse response)
    {
        Debug.Log(response.ToString());
        ConnectRemoteClient(response);
    }

    private void ConnectRemoteClient(RequestMultiplayerServerResponse response = null)
    {
        if(response == null) 
        {
            networkManager.networkAddress = configuration.ipAddress;
            telepathyTransport.port = configuration.port;
            apathyTransport.port = configuration.port;
        }
        else
        {
            networkManager.networkAddress = response.IPV4Address;
            telepathyTransport.port = (ushort)response.Ports[0].Num;
            apathyTransport.port = (ushort)response.Ports[0].Num;
        }

        networkManager.StartClient();
    }

    private void OnRequestMultiplayerServerError(PlayFabError error)
    {
        Debug.Log(error.ErrorDetails);
    }