Hi, thanks for answering.
I never had flashed before my Mi 8, i had the ROM it was delivered with. I decided to flash the rom xiaomi.eu_multi_MI8_V12.0.1.0.QEACNXM_v12-10.zip and I used for that a tool named XiaoMiTool v2. I used it to flash twrp and everything went fine, twrp booted and I was...