Chromebook support without subscription

So only the paid version of pritunl supports onc files. The thing is that whenever I try to generate an onc file from the ovpn file, since there is NO way I am paying for it, the chromebook says:
“Certificate rejected by network”.
Digging a little deeper, I saw that the RSA private key could be needed. Is there any way to create a .onc file or do I have to pay up switch to the barebones OpenVPN server?

It’s recommended to use a VPN client from Google Play if the device supports it. The onc file support requires a premium or enterprise subscription.

OK. but can you send me an example that pritunl generates.
If not, then goodbye.

The template is available here pritunl/

That’s great. I don’t need it, but send an example .onc file. Thanks.