We are aware that there are issues affecting our payment gateway. We are working with our vendor in order to resolve the issue. Please contact our billing team for additional assistance. There are no issues with our Paypal payment method, we encourage you to use Paypal at this time. We will keep this post updated as we receive additional information.
---UPDATE---
At this time the issue with our payment processor has reported that the issues have been resolved, which has been confirmed by our engineering teams. We will be continuing to monitor things on our end. Please open a support ticket if you continue to experience problems and we will be happy to investigate further.