Hello,
Thanks for using our theme.
Your site under maintenance mode, so we can’t check it.
Please read this article – https://www.8theme.com/documentation/xstore/troubleshooting/how-to-speed-up-my-website/
Sometimes slow speed can be a result of your hosting service. If you have checked the above items and the site is still slow, the most likely it is a server/hosting issue. Contact your host and discuss it with them. Because even with the default WP theme site speed could be slow.
Regards















