Connection error in Android app

Hi I generated an apk (tutor android build debug) from a Koa instance on my macOS BigSur machine. I have connection error (“Connection error. Please check your internet connection”) when I register/sign-in through an Android emulator (apkonline.net). I tried other apk (not tutor) and it is OK. Appreciate inputs on how to go about this. Thanks.

Hi @newbie.py
Please try after registering the application with the following grant type.

Go to yourdomain/login?next=/_o/applications/register/
* Client ID: Your android client ID 
* Client secret: Your android client secret 
* Client type: Public
* Authorization grant type : Resource owner password-based
Save