Can't purchase through the Admin Console, "Gathering all your product details" forever

I'm trying to buy some Acrobat licences through our Admin Console, and whenever I click on Buy More I get the white modal with "Gathering all your product details" and an indefinitely spinning wheel. I think the website's security settings are blocking the purchase page from loading because I'm getting a few CORS errors in my Chrome console and specifically:

Refused to display 'https://commerce.adobe.com/' in a frame because it set 'X-Frame-Options' to 'sameorigin'.