Cannot Place Order

Hello,
I want to order Zoom Workplace Pro, but I'm having trouble clicking the "Order Now" button.
I filled out the Address Information form, then entered my Credit or Debit Card, and then clicked the "Order Now" button. I get this warning:
Error! The system cannot process your request at this time. Please try again later or use a different payment method. If the problem persists, please contact your bank or try a different payment method.

I've tried using three different credit cards, but the same warning still appears.

Any suggestions?