Old version of X Theme: You seems to be using very old version of X Theme 4.3.0. Please update X Theme to the latest version 6.2.5.
No Cornerstone installed: In front end the shortcodes are showing up because you haven’t installed Cornerstone. First you need to update X Theme and then make sure Cornerstone us installed by visiting X > Validation as doing to will automatically install Cornerstone.
To update X Theme 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 X Theme.
3. Please take a look at following doc about changelog: