Fastboot Error Failed To Boot Into Userspace Fastboot One Or More Components Might Be Unbootable ((hot)) -

"Failed to boot into userspace fastboot; one or more components might be unbootable"

In newer Android versions, the flashing environment is split into two layers: Bootloader Fastboot: "Failed to boot into userspace fastboot; one or

fastboot flash vbmeta vbmeta.img --disable-verity --disable-verification
fastboot reboot fastboot

If locked, unlock it (note: this wipes data): If locked, unlock it (note: this wipes data):

fastboot flash boot boot.img