This is one of the many side quests, which in some ways is much more difficult than the others. The fact is that you are asked to find the meeting point shown on the map. Everything is very simple:
We move to the flying flame at the entrance to the Forbidden Forest.
We turn around and go to the bridge on the right side.
Activate Lumos to see flying candles.
We do not turn off the spell, we enter the Forbidden Forest, go forward and do not turn anywhere. After a large tablet with a skull on the left there will be an uphill with candles.
We move up. There should be two chairs here. If so, the task will automatically end.
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