I have inherited a store that was previously put together by other developers and am still learning how FoxyCart works.
I am having an issue with allowing customers to update their credit card information. I know about sending them to the cart with ?cart=updateinfo. This takes them to a screen where they are able to login and input the new information they want. However, as soon as they hit the "Update My Account" button they are taken to a blank white screen and that's it. The update does not go through on the back end either.
This is the URL they are redirected to with the white screen: https://xxxxx.foxycart.com/checkout.php
I'm not sure if this is an issue with custom templates or what it could be, but it's starting to cause customer complaints and is stressing out our admins as the customer base grows.
Also, all of our customers are subscription based. I don't know if this makes a difference.