Conqueror's Breastplate bugged (AQ40 war chest)

After some weeks of farming, i finally got all i needed to return the quest "Conqueror's Brestplate" in order to get my chest tmog, but i can't return the quest.

I have all the required scarabs, idols, the carapace of the old god, and i'm revered with Brood of Nozdormu (though only honored is required for the quest), but the button "accept" is grey and i can't click on it…

The other quests for warrior AQ set look like they're working, only this one seems bugged.

Here are some screenshots of my items in bag, and of the quest at NPC (click on it to view it in higher size)

https://i.ibb.co/fD5xDXH/Capture-d-e...2-30-copie.png

Thanks in advance for solving this problem (i hope??) :)