After Update too PHP 7.2 we have some mistakes in Cart.
Warning: Use of undefined constant addon_jshopping_save_cart - assumed 'addon_jshopping_save_cart' (this will throw an Error in a future version of PHP) in /www/htdocs/w01aa735/mastavit.de/plugins/jshoppingcheckout/addon_jshopping_save_cart/addon_jshopping_save_cart.php on line 46