Cannot create a backup of SolusIO VPS. The following output can be found in the log file /var/log/solus/:
CONFIG_TEXT: cannot backup "df51615c-034f-47e1-83d4-7c6e1a294aa4" domain's disks to "/usr/local/solus/tmp/backups/24" directory: cannot freeze mount points of "df51615c-034f-47e1-83d4-7c6e1a294aa4" domain: cannot get response from libvirt within 10m0s
SolusIO bug #SIO-2837 which was fixed in SolusIO version 1.1.16575
Update SolusIO to the latest mainline version.
If the update is not the option at the moment you can backup the VPS manually using this article: