is an error because the installed game has been modified or converted from xci to install the latest tinfoil that resolves

steps:
1. Download tinfoil. IO from tinfoil.nro and put it in the switch directory;

2. Install any game that can be installed in the switch, then press r to enter the game

3. Open tinfoil and open “install unsigned code” in option, which requires the password

up up down down left right left right B A +

is up, down, left, right, BA+