Getting this message when adding a card - "Not a stripe card"

Hi guys,

I am facing an issue since last week. Whenever I try to add a card to purchase a new plan for one of my projects, I receive a message saying “Not a stripe card”, even though I have been using this card, and it has worked perfectly fine in the past. Tried all different cards and none of them is working.

Since I need to make my new website live within the next 2 days, I urgently need help with this issue. Can you guys please assist me with resolving this as soon as possible?

I’m attaching the screenshot of the error message.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)