You may find after installing that no quickview button is visible. QuickTray uses WooCommerce hooks to place the button, and some themes remove these hooks.
- Firstly, try a default theme like Storefront to see if your theme is at fault.
- If it is your theme, have a look for the file named
woocommerce/content-product.php. This file should contain a hook just before the closing
do_action( 'woocommerce_after_shop_loop_item' );. If it’s not there, create a child theme and add it in.
- You could also try changing which hook the button is displayed on.