Or More Components Might Be Unbootable: Fastboot Error Failed To Boot Into Userspace Fastboot One

You need the original boot.img extracted from your device’s stock firmware (the same version that was last running).

# Flash to current slot
fastboot flash boot boot.img
Modern Android devices have A/B slots. You may have flashed the boot image to slot a, but the bootloader is trying to boot from slot b, or vice versa. The active slot contains an unbootable Userspace Fastboot component. You need the  original   boot
This error is almost exclusively triggered by partition corruption or improper image flashing. Here are the most common root causes: # Flash to current slot
fastboot flash boot boot
Once you recover your device, follow these best practices to avoid seeing this error again: Then test: fastboot reboot fastboot # should enter
fastboot reboot bootloader

Then test:

fastboot reboot fastboot   # should enter userspace Fastboot without error