Unbricking fails due to "protocol error"

[Nirge]

Hi,
I have bricked a voxl in dev, trying to restore using the debug expansion, but the process fails:

~/Downloads/modalai-3-1-0$ sudo ./install.sh 
[INFO] adb installed
[INFO] fastboot installed

This process will completely wipe your VOXL
Would you like to preserve the /data/ partition which contains
things like calibration, wifi config, and docker images
To preserve files in /data/ answer Y
To wipe /data/ for a full factory flash answer N

Enter Y or N: 
n
[INFO] Rebooting into fastboot...
error: no devices/emulators found
[INFO] Waiting for fastboot...
[INFO] Waiting for fastboot...
[INFO] Waiting for fastboot...
[INFO] Waiting for fastboot...
target reported max download size of 536870912 bytes
sending 'aboot' (494 KB)...
OKAY [  0.047s]
writing 'aboot'...
OKAY [  0.444s]
finished. total time: 0.492s
target reported max download size of 536870912 bytes
sending 'boot' (56066 KB)...
OKAY [  2.140s]
writing 'boot'...
OKAY [  0.745s]
finished. total time: 2.885s
target reported max download size of 536870912 bytes
erasing 'system'...
OKAY [  0.004s]
sending sparse 'system' 1/3 (523027 KB)...
FAILED (data write failure (Protocol error))
finished. total time: 9.678s

Would appreciate any insights and help I can get.

[Chad Sweet]

Are you flipping the fastboot switch back? Your symptom is consistent with leaving the fastboot switch engaged instead of setting it back to normal after a few seconds

Might be worth watching the tutorial here if you're unsure

[Nirge]

Missed that part, thank you, it seems to do the trick.