A PHP Error was encountered

Severity: Warning

Message: Attempt to read property "id" on null

Filename: controllers/FrontEndController.php

Line Number: 304

Backtrace:

File: /var/www/html/application/controllers/FrontEndController.php
Line: 304
Function: _error_handler

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