I'm having an issue with running Visa Checkout in a live environment. The default parameters for loading up the lightbox popup is only allowing us to process Visa or American Express card brands, and is saying that Mastercard or Discover card brands cannot be processed.
The parameters are the same when using Sandbox properties, but in sandbox mode it allows us to process Mastercard card brands with no issue.
We have American Express, Discover, MasterCard, and Visa enabled in our Merchant Processor Configuration settings.
The odd thing is that we had no issues accepting MasterCard payments for the first two months of service using Visa Checkout, and then suddenly we lost support on the lightbox.
Any ideas on what the issue might be would be much appreciated.