The error message (Horizon OS) is a common fatal error encountered by Nintendo Switch users running custom firmware (CFW) like Atmosphère or the Hekate bootloader . It typically indicates a communication breakdown between the console's hardware (eMMC) and the software stored on your SD card. Common Causes of the Error
If you manually restored a NAND backup or suffered a crash during a Daybreak update, your boot components may be out of sync. pkg2 read failed failed to launch hos
Download the latest hekate_ctcaer.bin from GitHub and replace the old file on your SD card and your payload injector. The error message (Horizon OS) is a common
If none of the above fixes work, your eMMC chip may be physically failing, or the Switch’s bootloader region may be corrupted beyond software repair. Download the latest hekate_ctcaer
The "pkg2" file is a critical part of the Nintendo Switch operating system firmware that Hekate must read to initiate the boot process. Hekate cannot unlock the pkg2 file.
If updating files doesn't work, the system might be struggling to physically read the data.