px install

[triarii]

...

 

[sw-omit]

You could try installing Debian 12 and then installing proxmox "on top" of that btw, but given that you've had to select specific boot-options for the kernel, it could also be that the CPU (or other hardware) is "too new" for the kernel, but I'm not familiar enough with the material to say for sure on that.
https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_12_Bookworm