Hi There @jlouproductions
Thanks for writing in! I have disabled the following plugins on your site, and then the Pro builder started to function properly (see secure note).
- Cornerstone Custom Icons
- W3 Total Cache
You can activate those plugins one by one to see which one is causing the issue. With regard to the caching plugin, please follow our performance guide here on how you can implement accordingly (https://theme.co/apex/forum/t/customizations-performance/210)