I’d be more concerned about FORScan security - developed in Russia, source code not available for download/review and no security analysis/assessment (that I can find doing a quick look). At some point the PC running FORScan will be on your home network (e.g., Windows/FORScan updates, etc.)...
This happens to me on some sites. Some sites don’t accept your default card (e.g., Discover, etc.). Try changing your payment method to a different card.
A quick shoutout to Don (@aermtr) at BroFlaps (https://broflaps.com). My recent fender/door mishap trashed my BroFlap. Sent BroFlaps a note about buying a replacement (if possible..it's several years old). Don quickly replied and sent me a new one the next day, with hardware, gratis! Great...