Unattended robot with Community License 21.3

Hello,

I have Community License 21.3 and can create one unattended robot but can’t connect it between orchestrator and a virtual machine, is there anything that I missed about unattended robots?

Also, if a have an unattended robot and want to run it on a virtual machine, do I need to keep a session open to make it work? orchestrator will be able to comunicate to virtual machine, open a session and execute?

regards.

What’s error?
any screenshoot?