After a power failure in my home lab, I tried to login to my vCenter Appliance and get this error “The vSphere Web Client cannot connect to the vCenter Single Sign On Server”.
The solution for this problem is quite simple. For the vCenter Appliance, log in to the Management page of the vCenter Appliance. Stop and Start the vSphere Web Client Services.
For the Windows based vCenter, restart the vSphere Web Client Services.
After a few minutes everything is ok. Problem Solved.
** Edit 02-03-2016 **
Reboot of the vCenter Appliance should also solve the problem.
The information in this article is provided “AS IS” with no warranties, and confers no rights. This article does not represent the thoughts, intentions, plans or strategies of my employer. It is solely my opinion.