Hello, @ Jubaer,
Thanks for using our Theme and for contacting us.
1. I have updated all the Plugins. Please check back to your site after clearing the browser cache.
2. I have checked your site speed score actually, and it’s good, not bad your site time score is less than 2 seconds to load which is really good. Google prefers websites on its search engine which take less than 3 seconds to load.
Furthermore, There is only 1 thing left that needs to optimize in order to speed up your site score more check this image: https://postimg.cc/QBqnmNtd for this you can use the WP Rocket plugin here is an article on it how this plugin works with our theme: https://xstore.helpscoutdocs.com/article/128-how-to-improve-wp-rocket-settings-with-xstore
Regards 8Themes Team.