Zend_Controller_Action_Exception making GET request to /it/Flangia/Flangia_della_pompa/Angolo_di_90%EF%BF%BD%EF%BF%BD

404 The category you have requested is not available in your language: it

PHP /live/library/Tag/Controller/Plugin/Navigation.php, line 149
URI GET /it/Flangia/Flangia_della_pompa/Angolo_di_90%EF%BF%BD%EF%BF%BD

Stacktrace ?