A PHP Error was encountered

Severity: Notice

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

Filename: controllers/Blog.php

Line Number: 19

Backtrace:

File: /home/u9794800/public_html/application/controllers/Blog.php
Line: 19
Function: _error_handler

File: /home/u9794800/public_html/index.php
Line: 146
Function: require_once