I had this error message popping out in VCSA when I tried to perform an update via the VCSA gui (https://vcsa.fqdn:9458) and basically, the update process wouldn’t start.
I also couldn’t change the root password as I was getting into another issue Permission Denied. Set the maximim number of days when the password will expire.Administrator configuration updated successfully.
In order to get this solved quickly and be able to start your VCSA update process, open first a ssh session to your VCSA and change your root password by typing passwd.
After this step, you can move on to your update process.
Good luck!
Victor an End User Computing Consultant. You find him most of the time on Twitter (@01004753) but also on LinkedIn evangelizing new technologies and processes that can change in good, the world we live in. Victor has expertise in Server & Client Virtualization, Client Management, GPU Virtualization, HyperConvergence and Enterprise Security
Victor Homocea 
Thank you so much for this, worked like a charm when attempting to update our VCSA to the newest version. Cheers!
Glad I could help mate!
Exactly what I needed to continue with my upgrade of my vCenter HA Cluster. Thank you.
Awesome! 🙂