This article applies to all software versions.
\uD83E\uDD14 Problem
JetDR plugin does not show up after successfully installing JetDR and logging in to vCenter server.
You might see below error while checking client plugin or while enabling the plugin.
\uD83C\uDF31 Solution
This could happen if there is any issue with DNS so lets verify vCenter server IP and FQDN registered with MSA is reachable.
Try to register with IP and FQDN seperately to isolate if issue exists with only one so potential issue could be resolved with DNS.