I've been able to add only 1 server to the manager..every other time it immediately gives back the following error:
Failed to add server: Could not connect to <server_ip>
...the server is pingable from the manager. this is a fresh install of 184.108.40.206. licensing is fine.
i've verified the shared key - but if those were different, would i get a different error? this happens on a total of six servers that i'm unable to add.