Ionic devapp - does not load the page - err_address_unreachable

Hi Team,
I am new to Ionic. I was trying to follow the tutorial to create an app as per this link -

I am able to make the changes and view it on the browser. I have downloaded the ionic devapp on the mobile (Android Pie - Redmi Note 7 pro and Android Nougat - Redmi Y1). It detects the app when I run it from the console(Windows 10).

When I click on the app, it shows - err_address_unreachable

I have disabled firewall and it still does not work.

Please help!!