https://gbatemp.net/threads/psa-do-not-update-to-a-new-firmware-immediately-e-g-6-0.516497/Help i tried updating my switch firmware with this tool to 6.0 now it won't boot anymore. unknown package1, Failed to launch firmware.
(i don't have a backup)
Restore your rawnand.bin. There is absolutely no reason for you to be installing 6.0 at the current time.