I have Airvpn, it is working on my windows 10, Android phone and Raspberry PI 3. Same configuration files are not working on Pinebook. Tried on Android 6, 7.1, Armbian. Today I will try on Ubuntu Xenial image and let you know.
Have you tried to do some traffic after successful connection, in my case connection is established but no traffic is sent out or received? The same behavior is on all 3 builds.
Have you tried to do some traffic after successful connection, in my case connection is established but no traffic is sent out or received? The same behavior is on all 3 builds.