Have you tried to reboot system from there despite the message ?
Have you tried another factory reset at this point ?
https://xdaforums.com/t/rom-11-lineageos-18-18-1-z4tablet-sgp712-771.4199169/
Have you tried to reboot system from there despite the message ?
Have you tried another factory reset at this point ?
https://xdaforums.com/t/rom-11-lineageos-18-18-1-z4tablet-sgp712-771.4199169/