@Jest

The error comes from the fact that your BIOS is signed and afuwin checks this signature. If you have an embedded flash option in BIOS menu, try to use that. If not, all other options are potential dangerous.

The afuwin guide mentions /capsule and /recovery options to override secure flash, but avoid it. There are multiple reports of bricking the system.

Another one, less dangerous (but still!) is the /gan command. I first read about it in this thread, I just can't find the actual post to give proper credit. You could be in luck, because there is one report which mentions your exact card working.

Another method could be using AMISCE, but I don't know if your platform would be supported.

Tried with /gan command and it worked.

Thanks for the help.