VSSControl: -2147024784 / 0x80070070: There is not enough space on disk

A job with Guest Processing enabled fails with either:

VSSControl: -2147024784 Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. Cannot prepare the [Exchange server] data to a subsequent restore operation. Cannot store backup/restore manifest. Serial path: [C:\WINDOWS\VeeamVssSupport\metadata\Veeam\BurManifest.xml]. Cannot store a XML document at the specified location: [C:\WINDOWS\VeeamVssSupport\metadata\Veeam\BurManifest.xml]. COM error: There is not enough space on the disk. Code: 0x80070070

or

VSSControl: Index failed Error: Cannot write file in CFileWriter::WriteLongLong Win32 error:There is not enough space on the disk. Code: 112 Freezing guest operating system VSSControl: -2147024784 Backup job failed. Cannot create a shadow copy of the volumes containing writer's data. Cannot serialize a VSS metadata. Cannot save the Backup Components Document. Path: [C:\WINDOWS\VeeamVssSupport\metadata\VSS\BackupComponents.xml]. Cannot store a XML document at the specified location: [C:\WINDOWS\VeeamVssSupport\metadata\VSS\BackupComponents.xml]. COM error: There is not enough space on the disk. Code: 0x80070070

Ensure that there is at least 1GB of free space on all disks to prevent complications with actions relating to Guest Processing (VSS and Indexing).