Backup task initialization failed for Backup 'Vcenter'-VM, reason: An error occurred performing query 'VirtualMachineSnapshotInfoQuery'. Error: Login55FromVmware failed https://vcenter.domain.local/sdk/vimservice - xxxx-xxx as domain\user (4040813)

Error: Backup task initialization failed for Backup 'Vcenter1'-BIG-IP VE 11.4.1.608.0, reason: An error occurred performing query 'VirtualMachineSnapshotInfoQuery'. Error: Login55FromVmware failed https://vcenter1.cetil.local/sdk/vimservice - c1bd081a-0007-4160-95d6-b65746dc0a3f as cetil\bent85

we have followed the below steps:

•  In vRanger- My inventory - right click and  Credential  properties
• And clicked on Connect, it was prompting the username or password incorrect
• So we have changed the username to administrator@vsphere.local and able to connect
• Scheduled backups are completed successfully.