Resolve the failed state on the vCenter, and set the vCenter back to active to be able to attempt the update.
Symptoms:
Unable to update the VC, Error: Update not possible while [vc] and undefined is in failed state
VMware Cloud Foundation 4.x
The VC status has been marked as ERROR state due a pervious workflow/task failure.
Usually, this is a failed password rotation task.
When LCM precheck is run, it fails at 'VC Inventory Status Check' due to VCENTER <id> status in ERROR which is an expected behaviour.
Example of the proposed remediation displayed in the failed pre-check:
This issue has been fixed in SDDC Manager 4.2
Workaround:
We need to reset the VC State to ACTIVE.
Steps to follow: