OpenVPN on windows with a TUN device

Since my laptop hard drive  died, I did not have access to my home VPN. I needed to set up OpenVPN on windows. I setup my PKI and installed the portable version of OpenVPN. Tried connecting and got this error:

There is a problem in your selection of –ifconfig endpoints [local=X.X.X.X, remote=X.X.X.X]. The local and remote VPN endpoints cannot use the first or last address within a given subnet.

The fix? Add the following to your server config:

topology subnet

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