My server wont start!

I am trying to make a server i have to many guiclips popping dont know why... i am watching the youtube video on how to make a sever + client by the coding shack

heres my scripts

using UnityEngine; using System.Collections; using System.Xml; using System.Xml.Serialization; using System.IO; using System.Text;

public class Core : MonoBehaviour {

 public int Server01Port = 25000;
 public GameObject Player;
 public int DefaultLevel = 1;
 public int DefaultHealth = 100;
 public int DefaultEnergy = 50;
 public Vector3 Startpos= new Vector3(1f,1f,1f);
 
 bool _ShouldSave, _ShouldLoad,_SwitchSave,_SwitchLoad; 
 string _FileLocation,_FileName; 

// AccountStructure RegisterData; string _data;

 private bool Server = false; //Main Server (Default on/off)
 
 public ArrayList playerScripts = new ArrayList();
 
 public void Start()
 {
     _FileLocation = Application.dataPath;
     

// RegisterData = new AccountStructure();
}

 public void OnGUI()
 {
     GUI.BeginGroup(new Rect(Screen.width /2f - 300,Screen.height /2f - 300,600,600));
         
     if(Server == false)
     {
         if(GUI.Button(new Rect(200,50,200,50),"Start Server On Port: " + Server01Port))
         {
             StartServer();
         }
     }
     else{
         if(GUI.Button(new Rect(200,50,200,50),"Stop Server. Warning!"))
         {
             StopServer();
         }
     }
 }

 public void StartServer()
 {
     Network.InitializeServer(32,Server01Port, false);
     Server = true;
 }    
 
 public void StopServer()
 {
     Network.Disconnect(); // Shut down server (all connections)
     Server = false;
 }
 
 void OnServerInitiatized()
 {
     print("Server has started on Port: " + Server01Port + " Successfully");
 }
 

}