Restore AC power loss option absent

[Snarkface08]

Good morning everyone, I bought a Nipogi mini pc, model: GK3V with an Intel Gemini Lake J4125 SoC. The bios is an American Megatrends 5.13, with project version: 1AUAJ 0.38 x64. In the boot section I don't have the option for automatically restoring AC power.
I wanted to mod this bios so I used Afuwin x64 to get an image of my bios (but the programme doesn't color every block in green, I don't know if this is a problem). Afterwards, I used AMIBCP to enable the restore AC power loss option, and saved my new bios. Then I prepared my usb stick with Rufus to boot as FreeDOS and put the AFUDOS files in it, along with the customized bios image. Then I booted up the mini pc from the usb stick and it entered in the AMI firmware update utility. When I try to flash the bios image, it says me 46 - error: problem getting flash information.
What can I do to solve this problem?