There is scheduled maintenance coming in for Nintendo network services. This will happen tomorrow. In fact, the online services of all consoles, namely Switch, Nintendo Wii U and Nintendo 3DS, will not be available for the following period:
Friday 12 July 2019 to 3:00 until Friday 12 July 2019 at 9:00.
A rather long maintenance if we consider the usual standards of the Japanese company. Furthermore, the Kyoto-based software house did not disclose further details regarding the purpose of such maintenance. We, therefore, advise you to not play online at the time specified above and we invite you to stay tuned for more news!