OK, the panic happened in core_pcpu_init() when trying to load the kernel CPU initialization routine. Typically a problem here is due to the hypervisor reporting the wrong number of cores to TrueNAS. How many cores have you allocated to TrueNAS in ProxMox? How many physical cores do you have in your Ryzen CPU?
maybe I have the same isse.
I tryed to move my Truenas 12 to 13 and this is the screen of painc error.
The installation is on Proxmox 7.2-4 and VM are configured with CPU 8 core - 1 socket.
Do you think is better to move with another CPU layout?
Thanks for the help.