Paiement button disappear to the checkout page sometimes for some product

Hello,

When i add this product : https://www.k-youty.fr/produit-k-beauty/adhesion-au-club/

Monetico button doesn’ta ppear to the checkout page and cliant can’t pay !

The buttom appear to others products … to my computer but some customers can’t see too, like that…

Can you help me to fix it ?

Thanks

The page I need help with: [log in to see the link]