Help here! Moto g wont boot up! Hab check failed for boot

I unlocked the bootloader of my moto g and flashed it with 4.4.4 of Brazilian version thn updated to lollipop! Thn i planned to change my moto g to custom rom and tried but the recovery option always booted normally into the system! So I tried downgrading the mobile t with 4.4.4 Brazil version ! But hab check for boot is getting failed and moto g wont boot up but constantly restarting and showing android in stress! Help plz