An uncaught Exception was encountered

Type: Error

Message: Call to undefined function error404()

Filename: /var/www/tvorogh/data/www/akadev.ru/application/controllers/Courses.php

Line Number: 22

Backtrace:

File: /var/www/tvorogh/data/www/akadev.ru/index.php
Line: 336
Function: require_once