Hi, I was waiting for an update after the Great Britain Antiquarian was broken on your mod, but gave up waiting and tried my hand at modding, this is what I did to fix it if you want to throw it in your mod (or whatever you decide instead)
switch (unitDef.UnitType) {
case "UNIT_EXPLORER":
case "UNIT_ANTIQUARIAN"
switch (unitDef.UnitType) {
case "UNIT_EXPLORER":
case "UNIT_ANTIQUARIAN"