Normally people report errors from Aric's mod in the same topic as the mod rather than creating a new one, but whatever works. I'm going to link to someones post with basically the same problem, since my response will be the same. https://itch.io/t/563635/arics-expansion-rebred?after=540#post-4862129
Otherwise, wait a week or so for the next version, or feel free to try any of the fixes I've posted in that topic in the last 12 days (that was when the current version was released).