Tree of life Quest bug

[Elsik]

Hi everyone,

So I'm stuck with this quest where you need to kill all 8 orc troups inside the tree of life.
The quest log doesn't update when I kill them... And of course nothing happens when all of them are dead, I simply can't complete this quest.

I tried old savegames, starting the whole Elven islands chapter again but still have this bug. I also tried dropping all of my items before doing the quest and entering the tree but in vain.

Any idea to help me ? Will I be able to finish the game without this quest ?


PS : I'm playing in normal mode with the 1.7 version from steam.