I’ve had that problem many times and it seems like there are 2 things that need to be done. First, get rid of the serial number if it is still there. Make note of it first. This is contrary to what Plamen said but I got stuck many times and this worked for me. Put it back into SPFlash and do a download and format all with this Lunar OS version:
Then get the phone ready again: enable developer mode and then enable USB debugging. Use adb devices and accept the device from your phone.
The second thing that u may not have done is turn off the phone lock screen. Power it off.
I took screenshots in Windows 10 of the SN Writer settings in this link:
Read through the SN Writer guide they posted here:
I may have forgotten things I tried but I made a lot of posts with screenshots everytime that happened, so if still stuck try searching IMEI and lazarus in advanced search!
