[GUIDE] Running Volumio under Proxmox

I’m sorry to come with a stupid question. I need to update my volumio to bookworm. The last time I did something to my system is like 100 years ago. I downloaded (and also tried the link) the image and used balena etcher (like the times before as I remember) but it throws an error (4.005 and 4.011, the one for generic PC, I want to install it on a lenovo thingy with proxmox VE) “RequesMetadata is not a Function”.

I have some trouble understanding what’s going on, since I somehow succeeded in installing proxmox and home assisstant. what am I doing wrong?