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Fatal error: Uncaught Error: Call to undefined function wc_get_stock_html() in /usr/home/billing/public_html/wp-content/themes/sydney-pro-ii/woocommerce/single-product/add-to-cart/simple.php:28 Stack trace: #0 /usr/home/billing/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(199): include() #1 /usr/home/billing/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(936): wc_get_template('single-product/...') #2 /usr/home/billing/public_html/wp-includes/class-wp-hook.php(298): woocommerce_simple_add_to_cart('') #3 /usr/home/billing/public_html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters('', Array) #4 /usr/home/billing/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #5 /usr/home/billing/public_html/wp-content/plugins/woocommerce/includes/wc-template-functions.php(925): do_action('woocommerce_sim...') #6 /usr/home/billing/public_html/wp-includes/class-wp-hook.php(298): woocommerce_template_single_add_to_cart('') #7 /usr/home/billing/public_htm in /usr/home/billing/public_html/wp-content/themes/sydney-pro-ii/woocommerce/single-product/add-to-cart/simple.php on line 28