The Rover app does not work

Hello! I bought a new Zyxel NBG7510. After installing and setting up the router, I wanted to connect it using the Zyxel Rover application to the phone. When I open the application, it loads normally and finds my router, then I enter the Admin data and wait for approximately 2 minutes when after this time it says "Server is Disconnected" and the only option that can be clicked is "Ok" and then the process repeats . The login data is 100% correct. I tried to reinstall the application, I also tried it on another phone, but still the same error.