question

Try to compile Unicorn Battle client (https://github.com/PlayFab/UnicornBattle) and get the following errors:

Assets/Scripts/PF_StaticsAndHelpers/PF_PubSub.cs(5,15): error CS0234: The type or namespace name 'Sockets' does not exist in the namespace 'PlayFab' (are you missing an assembly reference?)

Assets/Scripts/PF_StaticsAndHelpers/PF_PubSub.cs(15,19): error CS0246: The type or namespace name 'EntityKey' could not be found (are you missing a using directive or an assembly reference?)

Assets/Scripts/PF_StaticsAndHelpers/PF_PubSub.cs(115,50): error CS0246: The type or namespace name 'PlayFabNetworkMessage' could not be found (are you missing a using directive or an assembly reference?)

My environment is:

Unity2019.4.14f1

PlayFabSDK 2.98.201027

Any hint?

PF_PubSub.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using PlayFab;
using PlayFab.Sockets;
using System;
using PlayFab.Sockets.Models;


public class PF_PubSub
{
    public delegate void PubSubMessageHandler(MessageFromServer msg);
    public static event PubSubMessageHandler OnMessageToPlayer;
    public static event PubSubMessageHandler OnMessageToAllPlayers;


    public static EntityKey currentEntity;


    private static bool isInitialized = false;


    public static void InitializePubSub()
    {
        if (isInitialized)
            return;


        isInitialized = true;
        //PlayFabSocketsAPI.Debugging = true;
        PlayFabSocketsAPI.Initialize();


        PlayFabSocketsAPI.OnConnected.AddListener(OnSocketsConnected);
        PlayFabSocketsAPI.Connect();
        PlayFabSocketsAPI.OnConnectionError.AddListener(OnSocketsConnectionError);
        PlayFabSocketsAPI.OnDisconnected.AddListener(OnSocketsDisconnected);




    }


    private static void OnSocketsConnected()
    {
        // create topics for both title specific AND player specific messages
        var entity = new PlayFab.Sockets.Models.EntityKey()
        {
            Id = currentEntity.Id,
            Type = currentEntity.Type
        };


        //Create a list of Topics to subscribe to
        var topics = new List<Topic>();


        //Create a Topic object to listen to
        var sendMessageToPlayerTopic= new Topic()
        {
            Entity = entity,
            FullName = new PlayFab.Sockets.Models.EventFullName() {
                Name =  "MessageToPlayer",
                Namespace = "custom.UnicornBattle"
            }
        };
        //Add that topic to the array		
        topics.Add(sendMessageToPlayerTopic);


        PlayFabSocketsAPI.RegisterHandler(sendMessageToPlayerTopic, OnReceiveMessageToPlayer);


        var sendMessageToAllPlayersTopic= new Topic()
        {
            Entity = new PlayFab.Sockets.Models.EntityKey() {
                Type = "Title",
                Id = PlayFabSettings.TitleId
            },


            FullName = new PlayFab.Sockets.Models.EventFullName() {
                Name =  "MessageToAllPlayers",
                Namespace = "custom.UnicornBattle"
            }
        };
        //Add that topic to the array		
        topics.Add(sendMessageToAllPlayersTopic);


        PlayFabSocketsAPI.RegisterHandler(sendMessageToAllPlayersTopic, OnReceiveMessageToPlayer);




        //send topic subscriptions and output any success or failures
        PlayFabSocketsAPI.Subscribe(topics, (subscribedTopics) =>
        {
            if (PlayFabSocketsAPI.Debugging)
                Debug.Log("Subscribe Success");
                
   /*          subscribedTopics.ForEach((t) =>
            {
                if (PlayFabSocketsAPI.Debugging)
                    Debug.LogFormat("{0} Subscribed Successfully", t.EventName);
            }); */
        }, (subscribedErrors) =>
        {
            if (PlayFabSocketsAPI.Debugging)
                Debug.Log("Subscribe Failed");
            
           /*  subscribedErrors.ForEach((t) =>
            {
                if (PlayFabSocketsAPI.Debugging)
                    Debug.LogFormat("{0}", t.Message);
            });		 */	
        });


    }


    private static void OnSocketsDisconnected()
    {
        Debug.Log("PlayFab PubSub:You were disconnected from the server");
    }


    private static void OnSocketsConnectionError(PlayFabError error)
    {
        Debug.LogFormat("PlayFab PubSub Error: {0}", error.GenerateErrorReport());
    }


    private static void OnReceiveMessageToPlayer(PlayFabNetworkMessage netMsg) {
        Debug.Log(netMsg.@event);		
        var jsonSerializer = PlayFab.PluginManager.GetPlugin<ISerializerPlugin>(PluginContract.PlayFab_Serializer);
        if (netMsg.@event.payload != null) 
        {
            var msg = jsonSerializer.DeserializeObject<MessageFromServer>(netMsg.@event.payload);
            
            


            if (OnMessageToPlayer != null)                        
                OnMessageToPlayer(msg);            
        }
    }


    private static void ProcessMsgResponse(bool response)
    {
        
    }
}