Error Code: 2124-5249
You receive the error code 2124-5249.
If you are receiving this error code, it likely indicates that the Nintendo Account service is undergoing maintenance.
What to Do:
Review https://www.nintendo.co.jp/netinfo/en_GB/index.html 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.