[Northrend][Icecrown] The Rider of Frost

[Alwaysgente]

WoW Freakz link: https://www.wow-freakz.com/quest_helper.php?quest=13162&&name=the-rider-of-frost
Bug description: The quest can't be turned in at https://www.wow-freakz.com/npc_finder.php?npc=30944&&name=vereth-the-cunning .
Once you kill the npc that the quest asks you to kill, you can't complete the quest because the button cannot be clicked and give you the rewards.
Proof: I tried to complete it with choosing both the weapons but it doesn't work with either of them. 1) http://prntscr.com/p64zs2 2) http://prntscr.com/p650ck
Simply test this because it can't be shown in printscreens .