Up2Pay Payment Gateway not visible in FunnelKit

I have installed FunnelKit and configured a sales funnel and checkout. Altough the front-end shows the option for the Up2Pay credit card method, when the user clicks on “proceed to payment” the checkout shows the “Order confirmed” page without ever redirecting the user to the TPV to actually pay.

Is there some configuration option I’m missing? Is Up2Pay compatible with FunnelKit at all?

Thanks a lot!