As you may have noticed, version 2.4 of Genshin Impact is available. It brings new characters but also a new area, the island from Enkanomiya. The rest of the story happens on the latter. And some quests will require you to solve puzzles in order to advance.
How to unlock the quest?
To be able to do this quest, you will first have to unlock access to the new area. Once done, continue the main quest until you unlock the one called “On the trail of the dragon and the serpent”.
Complete the quest
You will have to go to the small island of Temple of the endless night. To access it, you will need to find a portal to the east on Dainichi mikoshi
When you get there, start by interacting with the 3 lights on the ground, which represent the traces of ” ‘Abyssal Elementosaurs.
This will show you an unusable switch at the moment. Approach it and kill the enemies to be able to activate it.
You will then open a secret access. (Note: if the switch does not activate, interact with the mechanism next to it to go from day to sleepless night).
Once inside, activate the switch on the left pillar, then on the right pillar. Then look around the room for a base that allows you to switch to sleepless night.
Then type the statue in the center 3 times, to move the wall to the right place, then activate the switch on the left pillar.
The passage will then be open. Go left, then go up the stairs to get to a room with a sealed chest in the middle. Kill the enemies that will appear to complete this quest, the first of the 3 required to advance in the story.