Streaming assets android

Hello everyone. I have a problem with streaming assets on mobile devices(On PC everything is good). When I try to find out where is the problem, i discovered, that file couldn`t be found. But why? Help me please. Thanks in advance.

 public string languageName = "localizedText_en.json";
 public static LocalizationManager instance;

 private Dictionary<string, string> localizedText;
 private bool isReady = false;
 private string missingTextString = "Localized text not found";
 string filePath;

 void Awake()
 {
     if (instance == null)
     {
         instance = this;
     }
     else if (instance != this)
     {
         Destroy(gameObject);
     }
     DontDestroyOnLoad(gameObject);
 }
 private void Start()
 {
     if (PlayerPrefs.GetString("languageName") != "")
         languageName = PlayerPrefs.GetString("languageName");
     else
         languageName = "localizedText_en.json";
     Loader(languageName);
 }

 private void OnLevelWasLoaded()
 {
     if (PlayerPrefs.GetString("languageName") != "")
         languageName = PlayerPrefs.GetString("languageName");
     else
         languageName = "localizedText_en.json";
     Loader(languageName);
 }

 public void ChangeLanguage(string name)
 {
     isReady = false;
     languageName = name;
     PlayerPrefs.SetString("languageName", languageName);
     GameObject.Find("FadeManager").GetComponent<FadeManager>().TransitionToScene("ProtectEarthGame");
 }

 public void Loader(string fileName)
 {
     string filePath = "jar:file://" + Application.dataPath + "!/assets/";
     StartCoroutine(LoadLocalizedText(filePath, fileName));
 }

 public IEnumerator LoadLocalizedText(string path, string fileName)
 {
     localizedText = new Dictionary<string, string>();
     string filePath = Path.Combine(path, fileName);

     WWW www = new WWW(filePath);
     yield return www;
     string text = www.text;
     LocalizationData loadedData = JsonUtility.FromJson<LocalizationData>(text);

         for (int i = 0; i < loadedData.items.Length; i++)
         {
             localizedText.Add(loadedData.items[i].key, loadedData.items[i].value);
         }
     isReady = true;
 }