I want to run a VPN server before user login

I have read and implemented https://openvpn.net/vpn-server-resources/use-openvpn-connect-v3-on-windows-in-service-daemon-mode/. It works fine for a single client VPN.

I want to run a VPN that is a server. However, whenever I pass a valid server config file I always get an error "remote option not specified" in the event log. Well, I know this is a problem since it is a server config. Ok, so maybe OpenVPN connect is supposed to be a client-only VPN product?

Anyway, maybe I am doing something wrong or maybe this is a new feature request:
I'd like to be able to run a server VPN before user login using the technique described at https://openvpn.net/vpn-server-resources/use-openvpn-connect-v3-on-windows-in-service-daemon-mode/