Thanks for asking and sorry for the trouble you are facing.
We don't actually suggest our customers to run older version of X Theme and bundled plugins. Reason being new updates brings fresh features, bug fixes and more importantly running latest version of WordPress core, theme and plugins reduce the changes of site getting hacked. Would you mind sharing website URL for us to see what's the problem you are facing? If you are running any cache plugins including Cloudflare, please clear cache and try loading the website again. I also hope you have taken a backup and followed the update procedure as explained in our theme and plugin update guide: