You have the "Connexion" button (login in french).
When you click on this button, then "Create Account", you arrive on a page : https://alfange.academy/creer-un-compte/
But I would like it happens on it : https://postimg.org/image/5c56eo0hd/
(like on your demo)
I have this message: "ECHEC DE SÉCURITÉ. CONTACTER L'ADMINISTRATEUR" (in french)
In english : "Security failure. Contact the admin".
I can't create an account (you can try).
PS : What is the plugin js Parsley?