Hello there. If it can helps I can add my experience to the issue presented by bmos.
I was having the same issue and the extension was not working with this setup:
Newly created campaign
Extensions: "Advanced Character Inventory Manager for 3.5E and Pathfinder" + "PFRPG - Enhanced Items"
Modules: Paizo Official Core Rules + Ultimate Magic + APG + PFRPG Magic Items (Essential) or Ultimate Equipment by Faelwen (
https://www.fantasygrounds.com/forum...mate-Equipment).
With this setup it was not working just like bmos was showing in his video.
Tried to open the module PFRPG Archive Spells by Ken L (not available anymore - I had it before and still using it most of the time as the only spell module active) and still not working.
Finally tried to open PFRPG Spells (Essentials) or Farnaby's Spellbook (
https://www.fantasygrounds.com/forum...FRPG-Spellbook) and now it's working properly with both of them.
So I guess the problem is some kind of a conflict with the module used for spells