Just a heads-up to those who tend to install latest & greatest: the Element Plugin-in for vVCenter server which is commonly used by SolidFire and NetApp HCI customers, currently has its compatibility notes in Release Notes (v4.2.3).
Latest VCSA supported by this version:
VMware vSphere 6.7 ◦ VMware vCenter Server 6.7 Update 1
Later this info will move to the NetApp IMT.
Newer versions may work, but also not. For example plugin v4.2.3 doesn't seem to work on the very latest VCSA (22.214.171.124000 Build number 13010631). It did work for me with two post-6.7U1 updates, but it doesn't work on this very latest one, so check this carefully before updating VCSA or the plugin...
Despite NetApp HCI v1.7 being released *after* vSphere 6.7 U3, there's nothing on this in v1.7 release notes. Element Plugin for Element Plug-in for vCenter Server was released before vCenter 6.7 U3, so the reasonable thing to do would have been to provide this information in NetApp HCI v1.7 release notes, IMO. As is, the docs still have no information about this.
Using my lab as a testbed, I upgraded my vSphere 6.7 to version 126.96.36.199000 and only then was I able to get the plugin 4.3* to work in HTML5. With the most recent VCSA v188.8.131.52* (as of now) only Flash version worked.