Hello, @iZoe Soultions Pvt Ltd,
First of all, please update your theme and core plugin to the very latest version: https://xstore.8theme.com/update-history/
How to update the Theme: https://xstore.helpscoutdocs.com/search?query=update
After that please update the WooCommerce plugin to the very latest version as well and then try to check back your site after clearing the browser cache.
And if the issue will still persist then please add the below given code in functions.php of your child theme:
add_filter('etheme_stock_taxonomy_type', function($type){
return 'old';
}, 10, 1);
And let me know the result.
Regards 8Themes Team.