To resolve the issue follow the steps outlined below:
1. Enable the proxy and restart vRO:
(if using external HTTP proxy)
vracli proxy enable
vracli proxy apply
2. If there is no need of an external proxy, restore the default proxy configuration.
vracli proxy set-default
vracli proxy apply
3. Restart vRO service and ensure that the http.proxyPort now has a value populated:
/opt/scripts/deploy.sh
4. Retry the failed LCM upgrade request with the revert to snapshot option set to 'false'
If reverted to pre-upgrade snapshots perform steps 1 to 3 and then initiate the upgrade task.