I have an issue with my new factions mod where any player playing one of the new factions loses the game right at the start. The other strange thing is that these players are not revealed through the fog of war for allied players but also can't be attacked as enemies by allied players (can be attacked by enemy players).
I can play 1v1 game alright with these new factions, given that the opponent is not one of these new factions.
I followed The-Ultimate-How-to-make-a-new-Faction-Tutorial! archived at reddit.
The culprit could be step #24 but I think that relates to CRITICAL_BUILDINGS, which I also modified to the Mod's needs.
Not sure how can EF mod do new factions properly.