A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_ACCEPT_LANGUAGE

Filename: helpers/lang_helper.php

Line Number: 52

Backtrace:

File: /var/www/service/codeigniter/application/helpers/lang_helper.php
Line: 52
Function: _error_handler

File: /var/www/service/codeigniter/application/controllers/PdsView.php
Line: 147
Function: getBrowserLanguage

File: /var/www/service/codeigniter/public/index.php
Line: 315
Function: require_once