Thank you so much for your reply.
When I turn on my Formuler Z+ box, it starts normally, then it gives a menu to choose the language. After that, I choose the Wi-Fi and connect it to my Wi-Fi, and the date and time set automatically. Then it asks for the country, and I also choose the country. It acts as if it's going to start, but it returns to the initial menu to choose the time... and so on."