wcfm marketplace for woocommerce : customer can’t proceed to payment

Hi, I built a marketplace with wcfm for woocommerce but unfortunately customer can’t buy when proceeding to payment. I have only stripe payment enabled.

Instead of displayin thecredit card widget i get the following error message (in french ?? ) : “Désolé, il semble qu’il n’y ait pas de moyen de paiement disponible pour votre état. Veuillez nous contacter si vous avez besoin d’aide ou si vous désirez mettre en place une alternative”

I did some googling and it looks like this is a woocommerce stripe gateway error message.

Could you help me identify the cause of the problem?

1° is woocommerce stripte gateway fighting with WCFM internal strip gateway? Should I disable woocommerce stripe gateway ?
2° is woocommerce stripe gateway a must have and did i do a mistake with the configuration ?
3) May it be my current theme which alters the behavior of the payment page ?

thanks WCFM guys for helping me ??

Alexis