Thanks for asking.
I see that you have updated X Theme to version 6.2.4 but still using old version of Cornerstone 2.0.5. Please update Cornerstone to the latest version 3.2.4.
To update Cornerstone please take a look at following resources:
Version compatibility guide: To learn about the latest and compatible versions of bundled and supported plugins, please take a look at following doc:
2. Theme Update guide: Please take a look at following article to update Cornerstone.
3. Please take a look at following doc about changelog: