Fix for ‘featured product’ slider not working

If you’re using Woocommerce 3.x and your featured product slider isnt working, make the following changes:

Folder: /wp-content/plugins/storefront-homepage-extra-sections/sections
File: product-slider.php

Find this line of code:
$args = array( 'post_type' => 'product', 'posts_per_page' => $num_prod ,'meta_key' => '_featured', 'meta_value' => 'yes' );

Replace it with these lines of code:

$args = array(
	'post_type' => 'product',
	'posts_per_page' => $num_prod,
	'tax_query' => array(
		array(
		'taxonomy' => 'product_visibility',
		'field'    => 'name',
		'terms'    => 'featured',
		),
	),
);