cbbackupmgr backup to S3 fails to perform sub-command operations due to file being used by another process

C:\Users\Administrator>cd "c:\Program Files\Couchbase\Server\bin"

c:\Program Files\Couchbase\Server\bin>.\cbbackupmgr config -r backup -a s3://bkrepo --obj-access-key-id AKIAJP --obj-secret-access-key xzsNfaT --obj-staging-dir /root/bk-staging  --obj-region us-west-2

Backup repository `backup` created successfully in archive `s3://bkrepo`

c:\Program Files\Couchbase\Server\bin>.\cbbackupmgr backup -c localhost -u Administrator -p password  -r backup -a s3://bkrepo --obj-access-key-id AKIAJP --obj-secret-access-key xzsNfaT  --obj-staging-dir /root/bk-staging  --obj-region us-west-2

Backing up to '2020-08-04T22_48_59.4251885Z'

Copied all data in 3m38.0058358s (Avg. 98.61KB/Sec)                                               31591 items / 20.99MB

[=============================================================================================================] 100.00%

Backup successfully completed

Backed up bucket "travel-sample" succeeded

Mutations backed up: 31591, Mutations failed to backup: 0

Deletions backed up: 0, Deletions failed to backup: 0

Skipped due to purge number or conflict resolution: Mutations: 0 Deletions: 0

Post sub-command object store task failed: The process cannot access the file because it is being used by another process.

c:\Program Files\Couchbase\Server\bin>