Is that a Stripe screen? Set up american style to reduce friction, not supporting 3d secure, which means european credit cards will deny by default?
Stripe supports 3d secure and has for years. https://stripe.com/en-ca/guides/3d-secure-2
Fineprint says it's Stripe. My (european) credit card worked fine.
Stripe supports 3d secure and has for years. https://stripe.com/en-ca/guides/3d-secure-2