Whonix KVM - "no storage vol with matching name"

I’m re-posting this from a Whonix Discourse forum post I made about 3 weeks ago. It feels like it’s more relevant to NixOS and the way it stores files, so I’m not sure that the people on Whonix would be able to help. When I’m launching either the Whonix Gateway or Workstation virtual machine from the Virtual Machine Manager GUI on NixOS 26.05 I get the following error: Error starting domain: Storage volume not found: no storage vol with matching name ‘Whonix-Gateway.qcow2’ I’ve configured ...