Hi,
Could you please elaborate? What happens when you try to connect? Are you getting a blue screen on your windows PC when trying to connect to the PLC via OpenVPN client? This would be a windows related problem. I recommend you try updating your windows drivers.
You are using RMS VPN Hub, correct? You can also try to delete the hub, create and configure a new one, and download new ovpn configuration file.
Are you able to connect to your PLC in other ways? Directly? RMS connect -> remote HTTP(S)?
Kind Regards,
Andzej