Bootloop Fastboot Mi 11 Ultra | Xiaomi European Community

Hi,

I think I have done something very stupid, and now it seems that i brick my phone.
Hopefully someone is able to help here.

I have reset my phone on twrp and I think I have deleted data partition so I was not able to flash a new Rom by twrp.

So I download original Rom and flash it by fastbootmode with the Xiaomi Mi Flash Tool.
It runs up to 100% and tell me flash is successfully.

But it doesnt boot up! It ALWAYS boot back to FASTBOOT.

I try to install TWRP but i always get the follow error: FAILED (remote: Failed to load/authenticate boot image: Device Error)

Also, after flash stock image, I am not able to boot up with power / vol up.
My journey end always in fastboot mode.

I hope someone can help me to boot up my device.

Thanks in advance.
Chris

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