Fatal error: Uncaught Error: Call to undefined method WooCommerce::add_error() in /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-content/plugins/woocommerce-incremental-product-quantities/includes/class-ipq-validations.php:104 Stack trace: #0 /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-content/plugins/woocommerce-incremental-product-quantities/includes/class-ipq-validations.php(31): IPQ_Quantity_Validations->validate_single_product(true, 3862, 1, false, NULL, NULL) #1 /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-includes/class-wp-hook.php(288): IPQ_Quantity_Validations->add_to_cart_validation(true, 3862, 1) #2 /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-includes/plugin.php(206): WP_Hook->apply_filters(true, Array) #3 /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-content/plugins/woocommerce-3.4.0/includes/class-wc-form-handler.php(839): apply_filters('woocommerce_add...', true, 3862, 1) #4 /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-content/plugins/woocommerce-3.4.0/includes/class-wc-form-handler.ph in /home2/tzmbri93/public_html/tzmbrindes.com.br/wp-content/plugins/woocommerce-incremental-product-quantities/includes/class-ipq-validations.php on line 104