Hello,
i flashed the latest twrp and miui 10.3 for sakura ( RedMi6 Pro ) after sucessfull unlock of the phone. I went thru the steps, formatted the data partition, rebooted into twrp. I could not mount the data partition with twrp. At least i could not access it in Windows. So i inserted a sd card with the miui image. Then installed it with twrp. As far as i can tell, everything went fine.
Now after reboot i'm stuck with the message " System has been destroyed". I can't boot into anything else than fastboot. Curiosly the bootloader is now locked again. I can not flash any other fastbootfirmware with miflash. Suggestions anyone?
Thanks!
Unlock bootloader again, official way.
Then you can flash with miflash.
Why this happened I have no idea, and don't have your device.
Just remember someone in same situation.