: photo() does not exist

Message:   Method Controller_Article::photo() does not exist

File:   /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/library/core/router.php

Trace last:  
file : /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/library/core/router.php
line : 43
function : __construct
class : ReflectionMethod
type : ->
0 : Controller_Article
1 : photo

Full error string:
#0 /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/library/core/router.php(43): ReflectionMethod->__construct('Controller_Arti...', 'photo')
#1 /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/library/core/router.php(22): Core_Router::actionArgs('Controller_Arti...', 'photo')
#2 /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/start.php(51): Core_Router::route()
#3 /var/www/vhosts/topaggelies.gr/neoodeioalimou.gr/public/system/index.php(15): require('/var/www/vhosts...')
#4 {main}