Hello

In some cases I should connect to OpenVPN server. So I have .ovpn configuration file. It's works well while I'm connecting from home PC which runs by ubuntu 16.04 and connected though cable. But at work I'm using Orange Pi plus 2e runs by Armbian and connected  trough WiFi to my iphone. Connection works well without vpn. But there is a troubles using vpn. It's seems like my orange pi gets connect to server but traffic is flying somewhere another line. Chromium couldn't show pages, tun0 device showing 0 traffic, wlan0 device don't showing new traffic too. What should I fix? Please ask me for some data and where to look for it if you need. 

I don't think this is hardware related. Hmm ...  is it working if you connect your Orange via cable? Try removing /etc/network/interfaces and reboot.  Also, try modern NEXT kernel.