Hi, i've a big problem on a Pixel 8a.
I tried GrapheneOS but i wanted to return to stock. So i followed the instructions on your site and cancelled the key.
Then i flashed the stock android via the official Android Flash tool. At the end the tool wants to lock the bootloader but i get an error: Fastboot command (flashing lock) failed: 'invalid android images, skip locking'.
when i start the phone stock android seems ok but a warning comes that the phone is unlocked.
In the android flash tool i tried all the three rom versions (default, telstra and t-mobile) but always get the same error at the end of the process.
Also when i try tolock via command line i get the same error.
How can i now lock the OEM if i want to send the phone back??
thanks a lot