The app opened well, but after a few seconds a loading screen popped up that blocked any use.
This loading screen would not go away. I deleted the app, turned on the phone and reinstalled the app and the loading screen would come back.
After a week I decided to check my settings on the web browser and found that I had 3 screens with the free account.
So this was the issue, but this is still a bug on the app on the phone. It should not get stuck on a loading screen forever.
It should give the option to choose the screens.