This article applies to all JSDR software versions.
\uD83E\uDD14 Problem
The plugin does not load after the MSA has been upgraded.
\uD83C\uDF31 Solution
This can happen if the MSA version is higher than plugin version post the MSA upgrade.
Login to MSA web console
Click on Upgrade Plugin option
Logout and login to vCenter server and the newly upgraded plugin should load.