New Version 3.36.0
Since vSphere 6.5 the HTML5 client (vSphere-Client) is an integral part of the environment and is geting updated with more and more features with every release of vCenter. It is to get rid of the infamous flash client (web-client) sooner or later.
In distributions below 6.5 there’s no HTML5 client included. But it is possible to get the functionality with a fling.