TheWoWDBalso was having this issue , if you have a "gem-studded candelabra" unopened in your bags it will not let you turn in quest
Quest
A Scintillating Candle
A World of Warcraft quest in The Ringing Deeps. Facts and objectives from the current retail game data.
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Im Rep 20 with "The Assemly of the Deeps" and im on Alliance Side. (Quick Facts above said Quest is on Horde Side)
"Turn in for "A Scintillating Candle" failed. This quest's unique reward already exists in your inventory. Remove it to complete this quest."
I nether have Earth-Encrusted Gems or Resonance Crystals in my inventory.Help
Quest facts
LevelLevel 70-80
Quest ID82381
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(82381))
Community notes from Wowhead · 4 comments
Top 2 shown above · 1 more hereThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
That resolved it for me. I didn't know I had to click on that gem to open it.