A PHP Error was encountered

Severity: Notice

Message: Undefined index: HTTP_REFERER

Filename: controllers/Welcome.php

Line Number: 68

Backtrace:

File: /home/isqapave_com/app/frontoffice/controllers/Welcome.php
Line: 68
Function: _error_handler

File: /var/www/isqapave_com/frontoffice/index.php
Line: 315
Function: require_once