Damn, can't connect on the android app (Tusky). The oauth tokan won't be redirected to the app, but I dunno if it's because I'm using Privacy Browser or because there's no google app or service available on my phone.
@Killiox I used Firefox in default mode, on Android 7.1 and it worked instantly.
@Bobo_PK So, I'm on Android 5.1.1, and I don't use Chrome nor Firefox.
@Killiox I'm by no means an expert on how the OAth token getting works but you just need it once. So my recommendation would be to use a nother browser. Maybe you can even use one on the PC (VM) and trigger the token process?