While playing the Wuthering Waves Side Quest called Secret Investigation, you may encounter an error that prevents you from entering co-op mode. I will explain why this happens and if there is anything you can do about it.
How to Unlock Co-op Multiplayer ► Wuthering Waves
Unfortunately, Wuthering Waves doesn’t warn players that they’ll be locked out of co-op during certain quests, an issue that plagued the early days of Genshin Impact. There’s also no way to pause the quest, so the only way to get out of the loop is to complete the Secret Investigation side quest.
The Secret Investigation Side Quest requires you to transform into an Exile and infiltrate their camp. Each time you fail, your disguise is removed and you are asked to wait until 9pm the next in-game day to try again.
As a result, the game is forced to keep transforming your character into an Exile every time you get near the quest area at 21:00 until you finally complete the objective. This quirk causes your world to get stuck in a loop, making certain features, such as multiplayer/co-op mode, unavailable.
