A PHP Error was encountered

Severity: Notice

Message: Trying to get property 'category_name' of non-object

Filename: controllers/Shop.php

Line Number: 824

Backtrace:

File: /var/www/html/travois.eu/public_html/application/controllers/Shop.php
Line: 824
Function: _error_handler

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