Problem solved by desactivating this AddOn

Seems to block "smartcardplugin.msi" to buy and charge my e-ticket card on a USB smart card reader / writter NEOWAVE Linkeo-I
When a selected Ticket is bought by the button "Acheter" the following screen is empty.
Once this Addon is desactivated, all works fine and the payment screen becomes available.

# carte Oura Pass TAG TCL