It seems that the Warlock's invocation "Devi's Sight" does not works. Wherever I cast the invocation, I get no indication of it's effects(no status effect icon, nor is it listed at the bottom of the character sheet) and whenever I cast from inside magical or non-magical darkness areas, I get the concealment penalty to my attacks.
Is that an issue with my copy or a problem with NW2? Perhaps there's an unofficial patch or mod that can fix this?
I've searched but not found a solution, any help would be appreciated.

Samzagas

Devil's Sight is bugged; it's never worked correctly, and as far as I know it's never been patched or fixed by an unofficial mod.

You can replace it the next time you level up.

What a shame, I love playing with darkness as a Warlock.

Thanks for the help.