Make sure that you run vCenter Server on a machine that meets the requirements for the VSA cluster.
You can install vCenter Server on a physical server or on a virtual machine. Make sure that the machine that you choose meets the vCenter Server hardware requirements to operate in a VSA cluster. The vCenter Server virtual machine can run on an ESXi host that is a part of the VSA cluster.
For detailed information about vCenter Server requirements, see the vSphere Installation and Setup documentation.
For additional requirements specific to VSA installation, see VSA Manager System and Software Requirements.