When upgrading a Product using Aria Automation Lifecycle Manager, the upgrade errors out on connecting to vCenter.
Validate the vCenter credentials in Aria Automation Lifecycle Manager by going to Lifecycle Operations > DataCenters > Click Edit (the pencil Icon) on the vCenter that is not connecting > verify vCenter details and credentials > Validate and save on success.
Then Click the Refresh Data Collection Icon for the affected vCenter. After the Request completes successfully, retry the Product Upgrade.