The world of Nintendo Switch gaming exists in two parallel universes. On one side, you have legitimate users downloading updates directly from Nintendo’s CDN. On the other, you have the homebrew and custom firmware (CFW) community, relying on file formats like NSP (Nintendo Submission Package) to install and update games.
Further Reading & Resources:
Here is the core of the issue. Starting with Nintendo Switch Firmware 17.0.0 (released October 2023) and continuing through firmware 18.0.0 and 19.0.0 (2024-2025), Nintendo introduced new key generation (Keygen) requirements for NSP installation. ben 10 power trip switch nsp update patched