validation failed. Could not verify the time on hosts

Hi,
I've found a solution to this issue by making installation of vertica using command line : install_vertica which showed the errors that have to be corrected. Corrections were made by installing the missing packages.
Once done, i've opened MC and imported the created cluster.
And all is OK now, my unique-node cluster is running and my Dev Team is happy to develop on a testing DB.

I hope this will help ...