VMware Cloud Director 10.5.1
VMware Object Storage Extension 2.2.2
There are stale entries in Object Storage Extension Database that causes the issue.
This is a known issue which can affect the mentioned versions of VMware Cloud Director and VMware Object Storage Extension.
Workaround:
To work around this issue, open a new case with the Broadcom VMware Cloud Foundation Support Team. For more information, see How to Submit a Support Request