These error codes are displayed when the Internet connection is unstable.
The following may resolve the issue:
・Play in an area where you can get a good connection.
・Try playing at different times.
・Switch between cellular and Wi-Fi connections.
・Restart your router.
・Check the settings of the following apps or software if you are using them:
- Security software
- Content blocker
- VPN
- Go to Settings, Cellular, Cellular Data Options, then Data Mode, and turn off Low Data Mode. (This may not be an option depending on your OS version.)
・Close apps other than Mario Kart Tour.
・Restart your device and Mario Kart Tour.
If you cannot launch the app due to these errors, please send an inquiry to the following e-mail address:
mariokarttour-support@nintendo.co.jp
Note: When you send the inquiry, please explain that the app won't launch and the following error codes are displayed: 819-0201 and 805-2628.