Reading BIOS from ASUS Rog Flow Z13 with CH341A

Hi Fernando,
I really appreciate your effort and kindness to help people. I encountered a problem and I need your help. I have a notebook ASUS Rog Flow Z13-z301VV and I extracted the bios with AFUWINx64.exe of Aptio 5.x AFU and modified it. And then I tried to flash the modded bios with the same tool. But it fails the verification and it’s says “secure flash enabled”.
How can I possibly disable this “secure flash”?
Thank you in advance.