@stanwood There are not working urls:
https://ci.ubports.com/view/Device Compatibility Images/job/Device Compatibility Images/job/halium-santoni/184/artifact/halium-unlocked-recovery_santoni.img
and
https://ci.ubports.com/view/Device Compatibility Images/job/Device Compatibility Images/job/halium-santoni/184/artifact/halium-boot_santoni.img
Someone should change config for Redmi 4X.