Error Code: 2124-5119
If you are receiving this error code, it likely indicates that the Nintendo Account service is undergoing maintenance.
What to Do:
Review support.nintendo.com/networkstatus for the most up-to-date maintenance and server status information, and then try again after the posted maintenance has ended.
Situation Not Resolved:
If the error persists, and there is no notice of Nintendo Account maintenance, wait a while and try again later.