Any one help me how to solve the

[imharisaa]

After doing all GPU Passthrough steps when i run basic.sh with sudo it show the error

and fail to start qemu

[Medizinmann-MD]

Something went wrong and your .rom file isn't found.
And to really help you a bit morte info would be helpfull - like what CPU do you use, what GPU etc.

I found a really good guide for Proxmox that helped me to get GPU-Passthrough up and running.
May be you find some hints there as the underlying quemu should be very similar - just an idea.
https://blog.quindorian.org/2018/03/building-a-2u-amd-ryzen-server-proxmox-gpu-passthrough.html/