Thank you for writing in, you keep X and X - Shortcodes outdated but you updated the Wordpress to the latest version (5.2.2) which might cause the conflict.
I would strongly advise to update the X and install the Cornerstone (replacement of X- Shortcodes plugin) to avoid any potential conflict in the future.
Updating Your Themes and Plugins
Follow the Manual X Update Via FTP method, because the Automatic Updates won't work on an outdated version.
The best way to do this is to clone your site on a staging site and do the updating there first, more about this here.
You may seek help from a developer should you not feel comfortable making these updating yourself.
Let us know how it goes,