Today, I install it and everything works fine.
I Think, Error 255 is problem with memory.
Process i did is- Boot to twrp/install recoveryTWRP.img(from 1 post)/reboot to twrp/wipe/format data-yes/reboot to twrp/wipe-factory reset/install-lineageROM(1 post)/Optional flash Gapps(opengapps-ARM64/A8.1)/flash magisk/reboot.
Wait some minutes and you are done.
Yeah, I did exactly that way /:
Ok. I will download again, test and come back here to tell what's happened. Tks