Parallels Management Console for Parallels Server uses Parallels Dispatcher SDK to connect to a Parallels Server host. It is valid for Parallels Server, Parallels Server Bare Metal and Parallels Server for Mac Bare Metal Edition.
By the way, the easiest way to download the bundled version of Parallels Management Console is to access your Parallels Server host by IP ot hostname via HTTP - http://you_psbm_server_ip - and you will be able to see the supplied Parallels Management Console, Parallels Transporter Agent, Documentation, etc.
So first of all, make sure that connection from your workstation to Parallels Server Bare Metal is not filtered on port 64000.
Also, make sure you can successfully authenticate with provided username and password directly in server shell - connection via SDK requires to have a valid system user account. By default it is suggested to use root account (and it usually works out of the box, without any adjustments).
If you cannot log in directly to server shell - then it is necessary to find the root cause of that - there might be a wide variety of general issues - starting from mounted /proc read-only which results in PAM authentication failure and ending with hardware problems.
Finally, make sure that you select Connection Security level not lower than it is specified on you Parallels Server host:
And on server side:
Also it is advised to open a support ticket, when the issue is mission critical, because the forum is checked by Parallels team occasionally and you might not get a reply in timely manner.
[18:37:06][~]# prlsrvctl info | grep security
Minimal security level: normal
[18:37:25][~]# prlsrvctl set --min-security-level low
The Server has been successfully configured.