GIGABYTE B450 AORUS M and rebar

Hello. I cant flash modded bios. Is there any way that i can od it? I’m modded lastest bios B450AORM.63d but when i try to flash it it give me error. I try it flash using bios. Can someone help me?
Im using ryzen 5 2600 and rx 580 8gb, in gpuz everything is on but rebar enabled is off. so i guees i need to enabed it, but in bios there is no such a thing to enable, i guees i need to flash modded bios but i cant, i guees my mb does not allow me to flash modded bios.

it’s all in the rebaruefi wiki

Hi there, since i have rebar in my bios already but can not enable it thru bios, can i use modGRUBShell.efi to change the offset?

Someone else tried this on their Gigabyte B450M + Zen2 CPU at it didn’t work. The only thing that worked was using ReBarUEFI

i tryed to flash bios, but i cant. i got “BIOS is protected by SecureFlash” so im stuck there…