Fatal error: Uncaught Error: Call to undefined function wc_get_product_ids_on_sale() in /furanet/sites/rolleat.com.hk/web/htdocs/wp-content/plugins/woocommerce-products-slider/templates/wcps-slider/wcps-slider-hook.php:265 Stack trace: #0 /furanet/sites/rolleat.com.hk/web/htdocs/wp-includes/class-wp-hook.php(324): wcps_slider_main_items(Array) #1 /furanet/sites/rolleat.com.hk/web/htdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #2 /furanet/sites/rolleat.com.hk/web/htdocs/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #3 /furanet/sites/rolleat.com.hk/web/htdocs/wp-content/plugins/woocommerce-products-slider/includes/class-shortcodes.php(72): do_action('wcps_slider_mai...', Array) #4 /furanet/sites/rolleat.com.hk/web/htdocs/wp-includes/shortcodes.php(434): class_wcps_shortcodes->wcps_new_display(Array, '', 'wcps') #5 [internal function]: do_shortcode_tag(Array) #6 /furanet/sites/rolleat.com.hk/web/htdocs/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(wcps)(...', 'do_ in /furanet/sites/rolleat.com.hk/web/htdocs/wp-content/plugins/woocommerce-products-slider/templates/wcps-slider/wcps-slider-hook.php on line 265