Error: "A client which was not in the connected player list disconnected. ???"

Hi,

I have two locally connected applications, one being the server, the other being the client. It always worked with my differents builds but this time I have the strangest error:

I don't have any messages in the console saying that a player has connected/disconnected, I only have "Server created" and this error. I should say that both applications works perfectly independently ...

Here's my code:

Server:

 using UnityEngine;
 using System.Collections;
 using System.Diagnostics;
 using UnityEngine.UI;
 
 public class ServerPropsMVR : MonoBehaviour {
     /* VARIABLES */
     int nbClient = 5;
     int nbPort = 25000;
     bool useNat = false;
 
     public Text connexionStatusText;
     int playerCount;
 
     /* INITIALISATION */
     void Start (){
         playerCount = 0;
 
         Network.InitializeServer (nbClient,nbPort,useNat);
 
         Process.Start("MVR_Oculus_AsClient");
     }
 
     /* MESSAGES */
     void OnServerInitialized () {
         UnityEngine.Debug.Log ("Server created");
     }
 
     void OnPlayerConnected () {
         UnityEngine.Debug.Log ("Client connected");
         playerCount++;
 
         if (playerCount > 0) {
             connexionStatusText.text = "Connected";
             connexionStatusText.color = Color.green;
         }
     }
 
     void OnPlayerDisconnected () {
         UnityEngine.Debug.Log ("Client disconnected");
         playerCount--;
 
         if (playerCount < 1) {
             connexionStatusText.text = "Disconnected";
             connexionStatusText.color = Color.red;
         }
     }
 }

Client:

 using UnityEngine;
 using System.Collections;
 
 public class ClientPropsMVR : MonoBehaviour {
     // Server properties
     string serverIP = "127.0.0.1";
     int serverPort = 25000;
 
     /* INITIALISATION */
     void Update(){
         if (Network.peerType == NetworkPeerType.Disconnected)
             Network.Connect(serverIP, serverPort);
     }
 
     /* MESSAGES */
     void OnConnectedToServer () {
         Debug.Log ("Connected to server");
     }
 
     void OnApplicationQuit () {
         Network.Disconnect (200);
     }
 }