Is there any sort of up to date guide on setting up OpenVPN on a Mikrotik and having a windows client connect to it?

I've gone through what I think is the correct steps on the mikrotik, but I can't figure out how to connect a windows client to it at all. I'm getting stuck at the very first steps (Options error: you must define CA file (--ca) or CA path (--capath) and I'm not sure how to fix it.