Json file not found after the Build... Help

After I do build of the game when I run it, it can't assece to the Item.json file

Here my code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using LitJson;
 using System.IO;
 
 public class ItemDatabase : MonoBehaviour {
     private List <Item> database = new List<Item> ();
     private JsonData itemData;
 
     void Start (){
         itemData = JsonMapper.ToObject (File.ReadAllText (Application.dataPath + "/Inventory/StreamingAssets/Items.json"));
         ConstructItemDatabase ();
     }
 
     public Item FetchItemByID(int id){
         for(int i=0;i<database.Count;i++)
             if (database [i].ID == id) 
                 return database [i];
         return null;
     }
 
     void ConstructItemDatabase(){
         for(int i=0;i<itemData.Count;i++){
             database.Add (new Item ((int)itemData [i] ["id"],
                 itemData [i] ["title"].ToString (),
                 (int)itemData [i] ["value"],
                 itemData [i] ["description"].ToString (),
                 itemData [i] ["slug"].ToString (), (bool)itemData [i] ["stackable"]));
         }
     }
 
 }
 public class Item{
     public int ID { get; set;}
     public string Title{ get; set;}
     public int Value{ get; set;}
     public string Description{ get; set;}
     public string Slug{ get; set;}
     public Sprite Sprite { get; set;}
     public bool Stackable { get; set;}
 
     public Item(int id,string title,int value, string description,string slug, bool stackable)
     {
         this.ID = id;
         this.Title = title;
         this.Value = value;
         this.Description = description;
         this.Slug = slug;
         this.Stackable = stackable;
         this.Sprite = Resources.Load<Sprite> (slug);
     }
     public Item(){
         this.ID = -1;
     }
 }

If anyone wants to help I have this questions to: http://answers.unity3d.com/questions/1425146/problem-with-animation-triggring.html

and:

http://answers.unity3d.com/questions/1421791/how-do-i-can-make-this-3rd-person-camera-smoother.html