I tried to connect to USB and use chrome's remote debugging tool (Remote Debugging Android Devices) but it says "No browser detected" when I open the app on my android tablet. Now I have no idea how to debug.
It worked for me before so is it related to cli-6.3.0 or the code of the app?
Is the installed app a release build or a debug build? What Android device & OS version are you testing with? It might also help to see your config.xml and AndroidManifest.xml (minus identifying/secret information).