AE0603 Failed to create VSS shadow copy for the VM (Hyper-V )

Error Message: AE0603 Failed to create VSS shadow copy for the VM on the Hyper-V host machine. (Hyper-V Host Machine=SERVERNAME, VM=VMGUESTNAME) Backup Server     : 16.0 or 16.5  Windows 2008 Standard SP1, 64...