FUNDAMENTAL ISSUE connecting to server when running on Android

I’m struggling with what should be an obvious and very simple matter.
Pretty basic stuff. I’m trying to get my USB connected Android device to communicate with the server. I have followed the guide, searched the internet for posts over similar cases and run

meteor run android-device --mobile-server=

But the app starts with no data from the database. The browser version works OK and shows everything as it should.

Could please anybody take me by the hand on this? :confused:

I finally solved this. As I suspected, there was something pretty basic missing in my picture and now it sounds obvious. Debugging with Chrome. Yeah. There I saw that the real error was ERR_CLEARTEXT_NOT_PERMITTED and that gave me a good hint on how to solve it.
I followed this answer on Stack Overflow: