Iherb store - well done, but letyshops - as always, the opposite: during 2 days during the promotion I tried to make an order with a -20% transition from the main one, "Page not found" and error number 426 when switching to payment or stupor on some of stages of choosing a delivery department. I tried it from another browser, and with clearing cookies, incognito mode, and the link that letyshops amended indicated ... The result is zero. Subsequently, it was possible to order iherb from the mobile application the first time, but letyshops did not credit the cashback from the mobile;) Iherb notified about this error, fortunately, they have an excellent support service (they answered that they know about this error, which is widespread), now explain to them why the failure occurred when switching from the letyshops service.