For those who has this bug, you could try to access the Custom AI Screen directly, by right-clicking the icon on the bottom left of the screen (three icons where you could choose between AI: Off, Auto Attack Only, and Custom AI), not from Character Sheet or Inventory Screen.
I just tried that and it works. I just remembered that the character sheet is sometimes broken by not showing attribute breakdown.
If you guys could also do this than the real culprit is the menu screen which can't deliver AI screen correctly.
[1.2] Behavior Editor is Broken
in Pillars of Eternity II: Deadfire Technical Support (Spoiler Warning!)
Posted
That totally works! You are the best!