SAP HANA database backup failed!
what is lockbox? what the reason about "Failed open lockbox *** clb.lb" ? and how to fix it?

1.police log
suppressed 17595 bytes of output.
2024年12月30日 00时00分31秒 Job 680017 with command 'nsrsapsv -LL -T saphana -s idc-oa-nve-01 -g HANA-Database/Workflow1/backup/HANA-Database -a "*policy action jobid=679962" -a "*policy name=HANA-Database" -a "*policy workflow name=Workflow1" -a "*policy action name=backup" -y "25 Days" -w "25 Days" -m idc-oa-h-3 -a "*policy action jobid restart=Yes" -b idc-oa-d-1 -o REQUESTED_LEVEL:level=full; -l full -q -W 78 -N SAPHANA:DEV SAPHANA:DEV' for client idc-oa-h-3 exited with return code 255
2024年12月30日 00时00分31秒 idc-oa-h-3.roxmotor.com：SAPHANA:DEV failed。

2.workflow log
Failed to open lockbox /nsr/lockbox/idc-oa-h-3/clb.lb
(pid = 18007) (12/30/24 00:00:31.540010) Backup failed. 
153395:nsrsapsv: Refer to the '/nsr/applogs/nsrsapsv_DEV_2024_12_30.00_00_31_18007.log' log of the 'NMSAP' program for details.

3./nsr/applogs/
/nsr/applogs/nsrsapsv_DEV_2024_12_30.00_00_31_18007.log does not exist