Creating VM under TrueNAS fails with "authentication unavailable: no polkit agent available to authenticate action 'org.libfirt.unix.manage'

Trying to create my first VM on TrueNAS SCALE, and not getting anywhere. Used to creating VirtualBox VMs, but I don’t think I’m trying to do it Oracle’s way and not noticing. Using the Wizard, so I’m just filling in boxes.

When I start the VM, and connect the serial console from the GUI, I get

You should post the version number of TrueNAS Scale along with all other info you think might help. What OS in the VM, settings, etc. Others may try to reproduce.

Sorry. Current, of course, and the VM is trying to be current Ubuntu.

The TrueNAS SCALE server is:

OS Version:25.10.1

Model:AMD FX™-6300 Six-Core Processor

Memory:16 GiB

The ISO I wanted to install was ubuntu-24.04.4-live-server-amd64.

The VM config is:

fsfsdev3
**Virtual CPUs:**1 **Cores:**3 **Threads:**1 **Memory Size:**3 GiB **Boot Loader Type:**UEFI **System Clock:**Local **Display Port:**N/A **Description:**fsfs dev environment **Shutdown Timeout:**90 seconds

Completely vanilla.