Hi There @7LeafClover
Thanks for writing in! First of all, make sure that you’re fully updated including WordPress, X theme, Cornerstone and WooCommerce plugin. You can check the latest version numbers from here (https://theme.co/apex/forum/t/troubleshooting-version-compatibility/195).
Then if you’re using a caching plugin on your site, purge server cache after updating your site and also head over to X -> Settings section and clear style cache.
Further you need to test for a plugin conflict by disabling your 3rd party plugins. You can do this using the following plugin (https://wordpress.org/plugins/health-check/) which has a trouble shooting mode. Once you enable the troubleshooting mode, it will only affect to the login user (not your site visitors). In this way you can disable your 3rd party plugins and see if the issue resolved.
If you’re still having issues, provide us with your login credentials in a secure note to investigate this issue further.
Thanks!