Hi, @tirongraphics.
I’m sorry to hear you’re having difficulty with the Custom Add To Cart button not displaying on your site’s shop page for some reason. Thanks for getting in touch and for your patience!
I appreciate your having included a link to the shop page on your site, where the issue occurs. I see what you mean.
What our plugin does is allow you to customize the default WooCommerce add to cart button without any custom coding. The issue you’re experiencing could be because the shop page on your site (which you mentioned uses the Divi Theme) might be displaying the products via a custom way (perhaps a Divi theme WooCommerce shop grid) instead of the default products or shop generated by WooCommerce.
To test for this, please could you temporarily switch to a default theme (e.g. Storefront by Automattic) and deactivate all non-essential plugins apart from WooCommerce and WooCommerce Custom Add To Cart Button, and see if it resolves the issue. I recommend doing this on a staging site rather than your live site, and creating a backup first.
?You can then reactivate everything one by one to find out which causes the issue.
Alternatively, you can also try displaying your products via the Shortcodes included with WooCommerce, rather than the module or widget included with the Divi Theme.
Please let me know how this goes.
Many thanks,