Multilingal site with language code prefix always fails

POST: "http://sach.dev/?q=drupalgap/system/connect.json" not found

1. Add language to drupalgap.pages.inc #line: 12

function drupalgap_status() {
-  drupal_add_js(array('drupalgap' => array('services_endpoint_default' => base_path() . "?q=drupalgap/")), 'setting');
    // FIX Multilanguage Site
    + global $language;
    + $lang_code = $language->language;
   +  if ($lang_code == LANGUAGE_NONE) {
   +      // Add drupalgap javascript settings to Drupal settings.
    +     drupal_add_js(array('drupalgap' => array('services_endpoint_default' => base_path() . "?q=drupalgap/")), 'setting');
  +   } else {
     +    // Add drupalgap javascript settings to Drupal settings.
      +   drupal_add_js(array('drupalgap' => array('services_endpoint_default' => base_path() . "?q=$lang_code/drupalgap/")), 'setting');
    }

    // Add drupalgap javascript.
    drupal_add_js(drupal_get_path('module', 'drupalgap') . '/drupalgap.js');

2. Change default language in mobile-application/app/settings.js at #line: 28

// The Default Language Code
Drupal.settings.language_default = 'en';

3. Download https://www.easystreet3.com/sites/default/files/jdrupal/jdrupal-7.x-1.2.js and copy file jdrupal-7.x-1.2.js" to "mobile-application/jdrupal-7.x-1.2.js"

4. Modify jdrupal-7.x-1.2.js at #line: 1234 by adding +Drupal.settings.language_default+"/"

 // Build the Request, URL and extract the HTTP method.
    var request = new XMLHttpRequest();
    var url = Drupal.settings.site_path +
              Drupal.settings.base_path + '?q='+Drupal.settings.language_default+"/";
    // Use an endpoint, unless someone passed in an empty string.
    if (typeof options.endpoint === 'undefined') {
      url += Drupal.settings.endpoint + '/';
    }
    else if (options.endpoint != '') {
      url += options.endpoint + '/';
    }

5. Change mobile-application/index.html at line: 18 by change jdrupal-7.x-1.2.min.js to jdrupal-7.x-1.2.js

 <!-- jDrupal -->
      <script type="text/javascript" charset="utf-8" src="jdrupal-7.x-1.2.js"></script>

6. Test Connection Fail but the mobile-app will run.