The most common cause by far is trying to install an update NSP (usually small, e.g., 500MB–2GB) without having the base game NSP (often 5GB–15GB) installed first.
Solution:
Pro tip: Use tools like NSC_Builder or SAK (Switch Army Knife) to inspect the NSP and see exactly which ProgramTypes are included. the nsp file is missing a programtype nca work
You need to inspect the contents of the NSP without installing it. Use PC tools: The most common cause by far is trying
Here is your step-by-step troubleshooting guide. Pro tip: Use tools like NSC_Builder or SAK