OpenNebula 5.0 beta virtual router


I have installed 5.0 beta and it have good GUI . Need some times to learn new features anyway .
I tried to create virtual router using alpine linux. Imported alpine form “App” and created template using it .
But after completing router configuration and create , machine is not booting up . It is showing "No bootable disk found "

I know its in beta state . From the documentation , i have added "device prefix " in template to “vd” and “network model” to virtio . But no luck . Can anyone help ?

Make sure that the image has set qcow2 as driver: