Changing protagonist name problem

[Dokken]

So here's my problem. I recently installed Binkan Athlete and when they propose me to change the protagonist name, well I'm just stuck. Pressing ok won't work, no way to close the game of whatever. Even with the default name they propose, it doesn't work. I can press the ok button, but just nothing happen. So of course I can't reach the proper game if I can't go through this step. Thanks in advance.