Cannot sign into app

What would be the reason that I cannot sign into my account in the Facer app for Android?

Just to see, I went and downloaded 4.1.1_4303, and I have no problem signing in. But on 4.3.5_4528, I cannot sign in. I get an error that I need to check my internet connection.

I’m on Note 4 Dev, android 6.0.1, CPF3