How to emulate new super mario bros u deluxe

When i try to emulate the nsp file it doesnt respond then says: error code 0008-000E
:error description is “The NCA key could not be found.” Please help, i just want better graphics because on my switch it looks garbage in my opinion.

log file: yuzu_log.txt (4.6 KB)

In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.

System Information for Support

Client Version                                Nightly 2026 HEAD-e70f16f
OpenGL Vendor                                 NVIDIA Corporation
OpenGL Renderer                               GeForce GTX 1050/PCIe/SSE2
OpenGL Version                                4.6.0
Docked Mode                                   [ ]
RNG Seed                                      [ ]
Use Accurate GPU Emulation                    [ ]

I did not find anything wrong in your log file. Please wait for a moderator to assist.

I think you need to dump your keys from your switch. There’s a guide on the yuzu website explaining the process.