Wizzair.com webpage has a very weird bug. When you're booking a plane in exactly the same time as your actual future flight will take over, it will prevent you from completing of such booking claiming that... your plane is about to depart!
Here you have a booking for end of January, so plane is actually departing in less than two months. But, because -- due to that weird bug -- Wizzair booking system is ignoring date, it has blocked booking completion claiming that plane is departing in less than three hours. Brilliant!