Added 4 minutes later
This error also broke the game itself, specifically the affected units. :( The only way to fix this is to "delete" this map-mod. Of course, it's also my mistake; I remember encountering a similar issue a long time ago when I was experimenting with Assassins. I need to save such maps after making changes using "save as" so that I can "roll back" if something goes wrong. Otherwise, it's a bummer. It's an unpleasant situation for now.