These are the errors that the site is throwing when accessing the Theme Options (actually with your Cornerstone as well) I’ve seen these errors a couple of times and most of the time (if not all), these are related to caching and/or security. I notice your site is under CloudFlare, please directly login to your CloudFlare’s dashboard and do the following (not on the CloudFlare plugins):
Exclude the Theme Options and Cornerstone builder from being cache by using this pattern
*myurl.com/x/* follow this article on how you can add a page rule (exclude) on your CloudFlare account.
Next disable the CloudFlare’s JS and CSS minification option, read this article., X theme’s JS and CSS files are already minified so you don’t need this feature.
Lastly and most importantly purge everything from the cache, also clear your browser’s cache to make sure that there is no cache involves when you load your pages.
If the issue still persists after this, please try turning off your 2 security plugins (All In One WP Security and Wordfence Security)
Let us know how it goes,