Ms SQL cluster DP/ZDB with 3PAR backup job has failed

Hi Everyone,

I am getting below error message while running backup job for ms sql cluster /ZDB. please advice. 

[Major] From: SMISA@abc.xyz.org "SMISA"  Time: 

[236:9211] No valid credentials were found to perform the requested operation on the

      following volume:

            Volume WWN:       6xxxxxxxxxxxxxxxxxxxxx0000

            Volume Name:     

[Major] From: SMISA@abc.xyz.org "SMISA"  

[236:9211] No valid credentials were found to perform the requested operation on the

      following volume:

            Volume WWN:       6xxxxxxxxxxxxxxxxxxxxxx0000

            Volume Name:     

[Critical] From: SMISA@abc.xyz.org "SMISA"  

      There are no valid objects left.

[Critical] From: SMISA@abc.xyz.org "SMISA"  

      Some or all storage volumes cannot be backed up. Session will abort.