Sigpatches (Signature Patches) allow your custom firmware (CFW) to install and run unofficial NSP files. If your sigpatches are outdated—even if your firmware is current—the installer won't be able to verify the NCA types within the NSP.
Your console doesn't have the "permission slips" to read the file. the nsp file is missing a programtype nca upd
How to Fix "The NSP file is missing a ProgramType NCA" Error How to Fix "The NSP file is missing
An is essentially a container. Inside that container are several NCA (Nintendo Content Archive) files. These NCAs hold the actual game data, the metadata, and the program executable. Search for the latest "Atmosphere Sigpatches
Search for the latest "Atmosphere Sigpatches." Download the zip file and extract the atmosphere and bootloader folders to the root of your SD card, overwriting any existing files. Restart your console and try the installation again.