you can download the newest version from their patreon its 5.25
that could possibly be why since you using an older version?
it doesn't work with 5.25. The mod description says so(at least at the time) and the game crashes every time I tried. It doesn't really matter sense the Aric's Rebred Mod came out to largely overhaul Arics Mod. The overly horny slaves being the more annoying problem to have, considering you get the Heal spell after a few days in game.