VPS backup fails in SolusVM 2: "timeout when try to receive Frozen event from VSS provider: Unspecified error"

Symptoms 

VPS backup fails in SolusVM 2:

SVM_ERROR: cannot backup the virtual server "4f3892ff-8c23-44e3-9346-2a4c6f257586": prepare virtual server's disks for backup: create snapshots for virtual server's disks: freeze mount points: internal error: unable to execute QEMU agent command 'guest-fsfreeze-freeze-list': timeout when try to receive Frozen event from VSS provider: Unspecified error

Cause

Qemu guest agent bug bugzilla.redhat.com/show_bug

Resolution

1. Update qemu guest agent to the latest version.
2. The latest virtio-win iso for windows you can find here:
   virtio-win/direct-downloads/latest-virtio/virtio-win.iso
3. Here you can find the ways to get the content from iso file in Windows OS:
   6-ways-to-mount-iso-files-on-windows-2022