I had the exact same problem since i unlocked bootloader and installed xiaomi.eu rom latest one..
just fixed mine by doing the folowing
Donwload the china fastboot rom = China Stable ROM for Xiaomi Mi 8 SE
Extract the persist.img inside of it
Copy the persist.img file to phone internal memory
Reboot to twrp and choose install image
Flash the persist image to the persist partition on the phone.
Reboot to system.
and its done!!!