The way I deal with similar errors (I've had both the taurus one and the centaur one), is to go into the expansionsetup.gd file and ctrl+f whatever the word is (in your case, taurus). Usually there'll be something like "person.genealogy.taurus" where there should be "person.genealogy.cow", or "person.genealogy.centaur" where there should be "person.genealogy.horse".
Do correct me if that's not the issue here though.