SyncVar Help

Unity Engine
1

I can not get this to work for the life of me. I’ve tried everything and it will not update to the clients. Thanks in advance.

using UnityEngine;
using System.Collections;
using UnityEngine.Networking;
using UnityEngine.UI;

public class ConnectedClients :  NetworkBehaviour {

    public Text connectedClientsText;
    public Network network;

    [SyncVar]
    public int connectedClients;

    void Update(){
        if (isServer) {
            connectedClients = network.connectedClients;
        }
        else {
            connectedClientsText.text = "Connected Clients: " + connectedClients.ToString ();
        }
    }
}
2

I also found this error message in the console.

Did not find target for sync message for 1
UnityEngine.Networking.NetworkIdentity:UNetStaticUpdate()