Help with OpenVPN and Chromebook setup

I’ve setup an OpenVPN Access Server which I tested to be working successfully. I can VPN in from home without any issues. I have a couple of HP chromebooks which aren’t compatible with the Android play store so I can’t download the OpenVPN app or RDP apps. I found an alternative in the webstore for RDP, and am trying to use the built in OpenVPN client but cant get it working. Anyone here been successful at setting this up that might be able to help me or give me some pointers?
My config is:
Provider Type: Open VPN
Server hostname: myFQDN
Username: username
Pass: password
For Server and User certificates, I’ve tried both “Do not check” and actually importing the certs.
So far it just errors out

On the free version you can only have 2 connections, perhaps this is what you are seeing.