Checkout Page in Pro Sites Disappeared


We recently upgraded to the most recent version of the Pro Sites plugin. There were no errors, but suddenly the options on the checkout page have disappeared. It just looks like in this screenshot: When I view the page source, all the titles and payment options are there, but they are not being displayed.

It almost seems like I'm missing a javascript file or css file in the upgrade... I've looked for CSS conflicts in our theme but haven't found anything obvious. Have you seen this happen before?

Thank you for your time!