I just upgraded to 2.4 and now when I want to use a credit card payment with ATOS, instead of getting the CB/Visa/Mastecard page, I get the home page with the message "Sauvegarder les options suivant les indications ici". I have not changed the configuration from before. I tried to save the 3 WPCB tabs Option General/ATOS/Dev to no avail.
There are some red options on the configuration screens (8. Optionel/10. Google connection not OK on Options Generales)