Hi,
1) When you were trying browser from same box(that of management server), you should have set correct localhost entry in /etc/hosts. If that is not there, then you would receive such error.
2) While you are launching it from outside of the box(giving box's IP or hostname), are you getting exact same error? or error like following
<management server ip or hostname>:5634 uses an invalid security certificate. The certificate is not trusted because it is self-signed. The certificate is only valid for root (Error code: sec_error_unknown_issuer)
If it is like above, you just need to add this exception in browser as known exception. Reason behind this exception is, we use self-signed certificates for authentication between management server and managed hosts.