Hello. I've been doing some side quests in Coerthas Central Highlands and I came across the side quest "Dark and Stormy Night" in Camp Dragon Head. The quest requires you to light unlit braziers around the castle. One of them cannot be lit. It's the one right next to the Aetheryte crystal. Attempting to select it to use key items doesn't work. Manually going to the inventory and selecting the key item makes the character start interacting only for a little moment before he gets interrupted.

Any tips?