"This error occurs when you have an issue with your wireless connection. Currently, the best solution is to remove all of the wireless network settings on your Nintendo Switch, then create a new wireless network connection setting. If you are still seeing the 2168-0002 after doing this, you may need to send the device in for repair.
2168-0002 is a network related error."
De ce qui se dit, c'est un problème lié au network et il est recommandé de désactiver la Wi-Fi.
Si le problème persiste, il va falloir l'envoyer en réparation ou faire jouer la garantie.