Kekko991 its exactly Bernt share on printscreen. You have to create user first, then login as this user ( not as admin) and then you get ovpn file. Download file to raspberry and use drag and drop to add it to uavcast. Use the same ovpn file to ground station. One more, you need to enable also direct connections on vpn server (you are doing that from admin account). Thats all , after that you will be able loging vpn server from rpi side and geound station.