Start SSH Session and Open in Browser are grayed out in Parallels Desktop 15 with Ubuntu 18.04 VM. openssh-server has been installed on the Ubuntu 18.04 guest OS and SSHing from the macOS host's terminal to the VM is working.
Update: After suspending and then resuming the VM, these options are no longer grayed out. Notice that restarting or powering off was not helpful. Only suspending did the trick. As a side effect, some printers where added to the guest. All this seems like a bug...
Update 2: After restarting Parallels Desktop, "Start SSH Session" and "Open in Browser" are grayed out again ¯\_(ツ)_/¯