I have prepared on-premise POC environment for OutSystems 11 without SSL certificate configurations. Everything is perfect in developing, publishing and using the applications except the users authentication in mobile. User login or authentication isn't working in my developed mobile app and I have no clue why my developed mobile app doesn't authenticate user on login screen where the developed web app has no issue in authentication. 

Is it because of not configuring SSL that my mobile app is not able to authenticate users on login screen?

My mobile app screens work if I use anonymous role on screens.

The behavior on mobile app login screen is like once I enter username/password and press login, it renders the login screen again emptying the text boxes. I tried to debug but couldn't find anything. Also checked the logs but nothing there related to authentication failure.