If you are trying to "install" an update or DLC, do not launch it directly.
The Nintendo Switch utilizes a complex filesystem architecture for its software titles. Unlike traditional executable formats (such as .exe or .elf ), Switch software is packaged into NCAs (Nintendo Content Archives). These NCAs are then containerized into an NSP file—a standard PFS0 (Partition File System) container.
Are you using an (like Ryujinx or Yuzu) or a physical Switch ?
