Ошибка при установке Kunena 2.0 - Kunena

Fatal error: Call to undefined method JAdministrator::getLanguageFilter() in W:\home\localhost\www\includes\menu.php on line 111

public function getDefault($language = '*')
   {
      if (array_key_exists($language, $this->_default) && JFactory::getApplication()->getLanguageFilter()) {              - 111 строчка
         return $this->_items[$this->_default[$language]];
      }
      else if (array_key_exists('*', $this->_default)) {
         return $this->_items[$this->_default['*']];
      }
      else {
         return 0;