Error: Timed out requesting agent port for client sessions.
These errors may occur because either:
A firewall prevents the remote machine from initiating communication on one or more of the assigned transmission channel ports, causing the process to increment the port it attempted to use until it exhausted the list of ports it was given.
A Managed Server (Windows or Linux) has had its default configuration altered so that the range of ports it would use is insuffucient, causing the process that is trying to start not to be able to find an available port to use.
Here is an extreme example where the Managed Server has been configured only to allow two ports to be used: