A classe 'core\libraries\URL' não foi encontrada.

Fatal error: Uncaught Error: Class 'core\libraries\URL' not found in /var/www/html/public_site/4470/views/empresa.tpl:406 Stack trace: #0 /var/www/html/public_site/4470/controllers/controller.class.php(41): require() #1 /var/www/html/public_site/4470/controllers/ctrl_empresa.class.php(6): controller::_render() #2 /var/www/html/public_site/4470/controllers/controller.class.php(26): ctrl_empresa::index() #3 /var/www/html/public_site/4470/index.php(44): controller::_init() #4 {main} thrown in /var/www/html/public_site/4470/views/empresa.tpl on line 406