A PHP Error was encountered

Severity: Warning

Message: call_user_func_array() expects parameter 1 to be a valid callback, class 'Main' does not have a method 'not_found'

Filename: core/CodeIgniter.php

Line Number: 514

Backtrace:

File: /home/www/selfbuild/sd/codeigniter/index.php
Line: 293
Function: require_once

File: /home/www/selfbuild/sd/websites/index.php
Line: 3
Function: include