After the last Easy Appointments update, our booking page started showing this error on mobile devices: “Form validation code expired. Please refresh page in order to continue.” This started immediately after the latest update, about 3 days ago. Before that, the issue was rare or non-existent. We tested with multiple people and multiple phones, and many of them got the same error when trying to make a booking from mobile. The page is excluded from cache, JS optimization is off, and the issue still appears. Please check whether the latest version introduced a nonce/session validation issue on the booking form.