When pressing the "Sign Up" button, it exits the game and enters the game again.

When you start up the game, you can see a "Sign Up" button in the menu.
It signs up the player.
This is not the case for me,
Whenever I press the button, it loads and then it goes back to the menu screen.
I tried this with 3 different phones, they all exit.
I use 1.14.2.50 (the form only allows 1.16) version, not updated, and I did not pay for the game.
My friend transferred the game to my phone so that maybe the case.
I got confused as I tried every way to sign up: menu, broadcast, profile, settings, all of them.
Please help me in this situation. I would appreciate it.

I uploaded the video if you would like to see it in action.