In setting up online depot received the following error
This issue typically occurs due to incorrect proxy configuration or network connectivity problems between the vCenter Server and the update sources.
Based on the error: configure your internet access proxy if you don't have a direct access to the internet.
Please see the following KB: Troubleshoot problems with vSphere Lifecycle Manager proxy configuration
https://knowledge.broadcom.com/external/article/372589/troubleshoot-problems-with-vsphere-lifec.html