TheGreyMouser wrote:Bug Work Around.
As of this date, you can not trade or vendor any of the quest items.
The same issue happened to me. Easy solution! Put the quest items in your bank. (I then visited the quest giver, just for good measure *of course it wouldn't complete with the items in my bank*. Next, I went back to my bank, took out the required items, then back to the Quest turn in..
Ta-daaaaaaaaaaaa... it worked!