I'm getting what I *think* may be a mod bug. In my current game, I've built two altars: order, and air. The order one shows up top as providing +1 mana, but under it, is String Not Found. The air altar seems to be producing no mana. Actually, it is: under the city that has possession of that altar, it shows as producing 1 of the mana that contributes to its production total of 4. So it's a reporting error.
I'm using your mod. CoS, CB, and BMB--with your mod adaptations for these.