Fatal error: Uncaught Error: Call to undefined function WC() in /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/includes/class-legacy-api.php:24 Stack trace: #0 /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/classes/class-slider-backbone.php(29): WC_Product_Slider_Legacy_API->get_legacy_api_url() #1 /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/classes/class-slider-hook-filter.php(80): WC_Product_Slider_Hook_Backbone->enqueue_plugin_scripts() #2 /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/classes/class-slider-display.php(48): WC_Product_Slider_Hook_Filter::include_slider_widget_scripts(Array) #3 /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/widget/class-slider-widget.php(94): WC_Product_Slider_Display::dispay_slider_widget('cGx1Z2luPXdjX3B...', Array, Object(WP_Error), '') #4 /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/widget/class-slider-widget.php(52): WC_Product_Slider_Widget::items_cycle('widget_product_...', Array) #5 /ho in /home/dox/www/wp-content/plugins/woo-widget-product-slideshow/includes/class-legacy-api.php on line 24