Your CFW lacks sigpatches. Update your Atmosphere and fusee.bin, or use a pre-patched NSP with a valid ticket.
"Check the usual shrines," whispered a user named Marth_Main99. "I heard a whisper that the 1.5.0 update—the one with the level cap increase and the Infernal difficulty—finally surfaced in a clean format." Fire Emblem Warriors Switch ROM NSP UPDATE DLC
To start your journey, you need the base game file. On the Nintendo Switch, digital software is typically distributed in the NSP (Nintendo Submission Package) File Size: Fire Emblem Warriors game requires approximately of storage space. Format Choice: (cartridge image) files are also common, Your CFW lacks sigpatches
on the Nintendo Switch, specifically focusing on the file format, which stores the game ROM, metadata, and updates. Core Software Overview on the Nintendo Switch