Cornerstone and X Update Creating "Front End" Problem

After updating both today (10/9/17) the preview for the editing page fails to load and gives the message “A conflict on the front end of your site has prevented the preview from loading.”

The website is curtisthementalist.com

I’ll provide login in a secure note.

Hi there,

Unfortunately, the credentials given in the secure note is not working and we can not access to the dashboard of your WordPress installation. Therefore I will give you common issues list which I suggest that you follow:

In addition please make sure that the PHP memory limit is enough to operate the website and the theme. To change the PHP memory limit please kindly read the article below:

https://theme.co/apex/forum/t/troubleshooting-customizer/196 (Not Working or Showing a White Screen section.)

​You may need to contact your hosting service provider for some of the steps mentioned above.

Thank you.