[ovirt-users] How to run virt-sysprep / How to troubleshoot template creation failure

When attempting to create a template the process fails. It has been suggested to run virt-sysprep manually and see why it it failed. Specifically, I have an Ubuntu 20.04 machine that doesn't boot properly even if the the template process does finish without error. I have tried creating the template several times as a test. about 80% of the time the template creation fails outright for qemu errors. The other 20% "appear" to work but the system boots to a grub emergency prompt Can someone clarify the process? I know you can run the command: virt-sysprep -d <name_of_vm> 1. Where do you run it from? The hypervisor host or the management engine? 2. What account do you need to use? What is the authentication username and password? I also think I read somewhere that you should refrain from using root. Anything else to know? Anything else to try regarding the grub prompt? Thanks.