[0.91] Spell of Making and influence bug/confusion

Every time I try to use the Spell of Making I am invariably told that I don't have enough Influence. I am supposed to have 4 influence. On the spell description it has influence as a "cup" icon. The same icon is shown at the top of the screen where it shows I have 35 of whatever that cup signifies. I cannot find a stat that tells me how much influence my nation has. Suffice to say using the same icon for multiple stats is confusing.