My switch is on atmosphere 0.16.2 with firmware 8.1.0. I tried to update to firmware 10.2.0 using ChoiDujourNX, but by mistake, I updated using only for FAT32 (my sd was exFAT). After the update, I had atmosphere error 2168-0001 0x2a8.
So I formatted my SD AND restored my nand using Hekate...