Have you tried the official Nintendo troubleshooting steps? https://en-americas-support.nintendo.com/app/answers/detail/a_id/55529/~/error-code%3A-2123-1502 ht

Have you tried the official Nintendo troubleshooting steps? https://en-americas-support.nintendo.com/app/answers/detail/a_id/55529/~/error-code%3A-2123-1502 https://en-americas-support.nintendo.com/app/answers/detail/...