the Scary Dark Chest is bugged, I’ve lit all the candles and it still doesnt open. Several other players related this too, but no solution until now.
So my experience is that the candles go back out and you need to light them all quickly enough that they’re still all lit when you try to open the chest.
Theyre all on, but the chest doesnt open:
(https://ibb.co/7jX09cy)
It certainly does look like they’re all lit in your picture. I did just try it again on a character and it worked fine for me, but seems like you’ve found some sort of unique bug for your circumstances.