Forse non ha accettato i coockie, oppure se…
When adding 2 or more products to a shopping cart - it is necessary for all the ordered products to be added in identical currency (in which the first product was selected)!
1) or all products in Franco Svizzero
2) or all products in Euro.
(Adding the product in different currencies will lead to fatal error (that you will be able to solve with clearing cache in your web browser)!)