the same thing happened.
the steps were: unlocked the bootloader
fastboot flash recovery twrp-3.2.3-0-sagit.img
fastboot boot twrp-3.2.3-0-sagit.img
format data
install xiaomi.eu_multi_MI6_8.11.22_v10-8.0
I have the miui official version (10.0.1.0) on my Xiaomi Mi 6.
When I install the .eu version, the phone dont boot. is always in the boot window. It's been 1 hour like this. I've tried 3 times already. I'm using twrp
i have the same problem. In other roms I could choose what I wanted to synchronize: email, contacts, calendar, tasks. At this point it just allows me to sync the email