Help-Cant complete blacksmith quests

Hi, im a lvl 22 player, and am now doing the blacksmith quests in forest haven again to earn some crafting resources. I currently have these open.

1) Crystal Skull (0/1) (yellow coloured)
2) My plate is Empty (10/10) (green coloured)
3) Obvious Troll (10/10) (green)
4) Lucky Leather (10/10) (green)

All green quests say: Return to Burke in Forest Haven for your reward!

The point is, i go to burke who has a yellow questionmark above his head, and he talks about the Lucky Leather quest and i see:

Rewards granted
Plate scrap
Plate scrap
Scrap of Leather

Choose from the following
Chain Scrap
Scrap of Cloth
Scrap of Leather

when i choose any of the following, a red line will appear around the item ive chosen, no matter which one I select. When i select "Complete" nothing happens, and when i talk to burk again, the same screen appears again.

What am i doing wrong? I have enough inventory space, im sure of it, and ive completed these quests before and im doing nothing differently. I hope someone here can help me and that ive discribed my problem well enough.