The error is when you try to connect to an already configured tunnel.

On Fri, Nov 2, 2018, 09:39 Kalin KOZHUHAROV <me.kalin@gmail.com wrote:

> On Fri, Nov 2, 2018 at 8:26 AM Laszlo KERTESZ <laszlo.kertesz@gmail.com>
> wrote:
> > The current FDroid build (version 0.0.20181031) is broken. The Gui
> starts but it states "Unknown userspace Go version" and the tunnel
> activation action results in an error.
> >
> Hmm... just installed (1st time) and started it, seems fine (haven't
> configured it yet).
> What is your configuration?
>
> Here: stock (no root) Android-8.1.0 (3.18.71-perf-gd0e0d1a kernel) on
> XT1905 phone.
>
> Kalin.
>