Mi8SE - case solved. Start from china stable 9.5.8.0 Android 8.1 - Fastboot flash twrp3.2.3-1102, just format data, reboot twrp, installed eu dev 9.3.1 wipe cache, returned to install twrp3.2.3-1227.img - reboot to system xiaomi.eu, Finally up and running. Thanks to all who gave ideas and helped!