Mi max 3 bootloop


Bob mi max 3

Members
Sep 17, 2018
10
15
hi guys
i tried to reset my phone and the phone its not booting

Xiaomi 8.8.3

i have twrp - unlocked bootloader
i have a backup file on an sd card but when i try to restore it says : Warning: This /data backup was made with f2fs file system! The backup may not boot unless you change back to f2fs
in the end it says Failed to unmont '/system'

if i boot to fastboot and try to flash with mitools the china rom it says permission denied

if i try to wipe everything and flash the xiaomi.eu 8.8.3 (which i had ) it completes the flashing but it has a black screen with the reset phone in the middle
if someone could help me please what to do next to restore the phone or reinstall any software
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