Fatal error: Uncaught Error: Call to undefined method WooCommerce::add_error() in /home/cableconnecting/public_html/wp-content/plugins/woocommerce-product-addons/product-addons.php:787 Stack trace: #0 /home/cableconnecting/public_html/wp-includes/class-wp-hook.php(288): woocommerce_product_addons->validate_add_cart_item(false, 1112, 1) #1 /home/cableconnecting/public_html/wp-includes/plugin.php(206): WP_Hook->apply_filters(true, Array) #2 /home/cableconnecting/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(776): apply_filters('woocommerce_add...', true, 1112, 1) #3 /home/cableconnecting/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(750): WC_Form_Handler::add_to_cart_handler_simple(1112) #4 /home/cableconnecting/public_html/wp-includes/class-wp-hook.php(288): WC_Form_Handler::add_to_cart_action('') #5 /home/cableconnecting/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #6 /home/cableconnecting/public_html/wp-includes/plugin. in /home/cableconnecting/public_html/wp-content/plugins/woocommerce-product-addons/product-addons.php on line 787