Hi,
I have just bought the zoo joomsef extension.
After installation and configuration, i have always the same problem when i go to the zoo component page (frontend) :

Fatal error: Call to undefined method SEFTools::usealias() in /var/www/vhosts/babinews.com/httpdocs/components/com_sef/sef_ext/com_zoo.php on line 23

Someone can help me???