configkops.py: error: At least one storageclass and volumesnapshotclass pair required

Hello

# kubectl logs netbackup-netbackup-config-deploy-bbf6d79c8-vfzth -n netbackup
usage: configkops.py [-h] --nbsha256fingerprint --isUpgrade
--configDeployment --nbprimaryserver --k8sCluster
--k8sPort --kopsNamespace --datamoverimage
[--storageclassblock] [--storageclassfilesystem]
[--volumesnapshotclassblock]
[--volumesnapshotclassfilesystem]
--waitTimeBeforeCleanupMinutes
configkops.py: error: At least one storageclass and volumesnapshotclass pair required

# kubectl get pod -n netbackup

NAME                                                READY   STATUS             RESTARTS      AGE

netbackup-controller-manager-7c8b9496d9-qhsmf       0/2     Pending            0             2m17s

netbackup-netbackup-config-deploy-bbf6d79c8-vfzth   0/1     CrashLoopBackOff   4 (54s ago)   2m17s

But...My end user K8S , No storage , No need for PV、PVC、Storageclass、volumesnapshotclass.

Can any one give me some idea for backup K8S without PV?

Thank you.