vCenter vCSA 6.0 Error occurred while retrieving vm names of the esx host

VMware Virtual Machine Hosting

You are in the process of trying to upgrade an existing vCenter 5.5 vCSA to 6.0.

Make note that it is asking for ESXi host to install the vCSA and not vCenter!

Error occurred while retrieving vm names of the esx host

Error occurred while retrieving vm names of the esx host