A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Languageswitcher.php

Line Number: 19

Backtrace:

File: /var/www/html/epoint_crm/application/controllers/Languageswitcher.php
Line: 19
Function: _error_handler

File: /var/www/html/epoint_crm/index.php
Line: 331
Function: require_once