Fatal error: Uncaught Error: Call to a member function validate() on null in /home/alovisi1/public_html/wp-content/plugins/Woocommerce.Product.Addons.v2.7.1/classes/class-product-addon-cart.php:246 Stack trace: #0 /home/alovisi1/public_html/wp-includes/class-wp-hook.php(288): Product_Addon_Cart->validate_add_cart_item(true, 6162, 1) #1 /home/alovisi1/public_html/wp-includes/plugin.php(206): WP_Hook->apply_filters(true, Array) #2 /home/alovisi1/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(797): apply_filters('woocommerce_add...', true, 6162, 1) #3 /home/alovisi1/public_html/wp-content/plugins/woocommerce/includes/class-wc-form-handler.php(771): WC_Form_Handler::add_to_cart_handler_simple(6162) #4 /home/alovisi1/public_html/wp-includes/class-wp-hook.php(288): WC_Form_Handler::add_to_cart_action('') #5 /home/alovisi1/public_html/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #6 /home/alovisi1/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #7 /home/ in /home/alovisi1/public_html/wp-content/plugins/Woocommerce.Product.Addons.v2.7.1/classes/class-product-addon-cart.php on line 246