Cannot install UCS 4.4-5: hangs at "Waiting for restart of server component"


I am trying to install UCS-4.4-5 from the iso image on a VM running on Proxmox VE. The installation went well till the last step and hang with the message

“Waiting for restart of server component”

I waited for about 20min it never finished. I could ping from the VM to Internet, eg ping works. I also checked the md5sum of the iso to ensure it’s not corrupted.

From /var/log/syslog I cannot see anything wrong. Perhaps the only thing non-standard I did is to install UCS without a swap partition, since the VM has 8G RAM.

Any idea what I can try?