UPDATING TO NEW FIRMWARE 21.0.0 IS NOT RECOMMENDED. THERE ARE COMPATIBILITY ISSUES WITH A LOT OF HOMEBREW APPS.
UPDATED APPS for new firmware 21.0.0 (download the MODDED files if there is no official release for FW 21.0.0). USE the modded files...
This video has a lot of details.
Maybe that helps.
Here is a topic with the same error code :
https://www.tronicsfixforum.com/t/had-cpu-10-nintendo-switch-everything-but-wifi-works-replaced-wifi-ic-already-2110-1118/9541/4