Cannot purchase the Modality Theme by VPthemes

Hi there,

I am trying to upgrade to the pro version of the Modality Theme but the payment screen is hanging. I can enter my details at the checkout page, but the payment portion of the page just shows the loading animation.

I have tried both chrome and firefox and clearing the cache, disabling plugins in both browsers, and even a different computer. Help!

I get this error here if I press enter after completing all fields SyntaxError: Unexpected token <

Help!