NAS4Free 9.1.0.1_687 cannot boot on my virtual machine

I was planning to test the new version of NAS4Free system on my Proxmox VE. I just downloaded the NAS4Free 9.1.0.1_687 and boot it on my virtual machine. I was expecting something new but I got the following black screen with errors code instead. 
I am currently downloading the updated version NAS4Free 9.1.0.1.804 and hope I won't see this kind of error. I don't know what to do.