I got the quest “Cleansing Drak"Tharon” and it says Drakuru wants you to use Drakuru’s Elizir at his brazier inside Drak’Tharon. Using Drakuru’s Elixir will require 5 Enduring Mojo." I have 5 Enduring Mojo in my bag but I cannot use them at the brazier. Neither clicking on the Elixers not on the brazier does anything. As a result, the quest cannot be completed.