You may use Audax Clausewitz validator to correct what must be corrected in order for the mod to be playable, just as Andrei Grigoriev and Therion did for Watkabaoi and MyMap.
Have you installed all the game's patches (1.1, 1.2, 1.3)? In that case you can use my patch for the mod
# History of Rome
# A mod of ancient times (322 BC - AD 60), covering world from Portugal to Japan, and from Sweden to Ethiopia
mod = {
name = "History of Rome"
dir = "History_of_Rome"
font = { "Glory" }
style = { "ancient" }
[color=yellow]shields = { "ancient" }[/color]
language = { "english" }
remark = "A result of merge of Historia Antiqua and Roma Universalis and their transfer to FtG"
[color=yellow]remark = "Version 0.2"[/color]
}