You must flash stock 6.0 rom before
Setup the rom normal reboot to recovery and then flash gapps
Give a try and reply
Hi, I installed a stock MM rom, then reboot recovery, factory reset, and install MIUI8v2, then reboot. At MI account, tap on Ignore, then "MI Cloud" FC systematically.
Reboot recovery then install GApps fixed, then Magisk v14, then reboot. At region selection, "Settings" FC.
Installing a MM rom before don't change anything. I've always MI Cloud or Settings FCs. Very frustrating :/