Our customers keep calling to tell us that they cannot checkout on our website. We currently have two payment gateways;
When I have tried to checkout myself, this message has appeared in an alert box:
Payment has failed, please reload checkout page and try again. Your card has not been charged.
Does anyone know what may be causing this and how I can fix it?
Obviously I have tried reloading the checkout page. This does not fix the issue.
edit: we are currently using Magento 18.104.22.168