There is a light door here, next to this exchange merchant, and the task is inside. The location is a box next to the bookshelf in front of the room (I have found it and finished it). Click the start task row. Personally, I suggest completing the main task and finally clearing the branch line.
The Lost Ark is a MMORPG game set in the Middle Ages. It has a refreshing battle, a movie version of the story, a versatile career, and no locked combat mode, including a variety of gameplay, including the game of grabbing treasures.