As I can see, your site working now (but I can’t see theme version because of autoptimize). Have you solved the problem or restored the backup?
In the latest update was added a Core plugin that is required. You can download the plugin here – https://www.8theme.com/downloads/ to install it manually via FTP or go to Appearance > Install plugins > WooPress Core plugin (install and activate).
If you need help with the update, provide temporary wp-admin and FTP access.
WooPress Core plugin should be used with the latest version of the theme.
Is the problem solved? If you need assistance, provide temporary wp-admin and FTP access. Also, disable a cache plugin on the site.