Backup jobs cancelled with this message when vRanger was running on a VM on a host that was 188.8.131.52663, in a mixed host version environment.
The backups of vm's on a host that was esxi 184.108.40.206792 - VMFS 3.33 - Failed.
If you put vRagner vm on the ESXi 4.0 host, It can back up vm's on both.
ESX 4.x will be backward compatibile to 3.5..
Move vRanger vm to the host with the newest version of ESX.