The widget is for displaying maps (not POIs) so the map will need to be saved on another page. It disables the directions link by default because the sidebar is usually not wide enough to display the directions form.
To re-enable the form, you can use the field where you can specify additional shortcode parameters. This should work to override its default and show directions in the sidebar:
It may work better to open instead open a new page with Google for directions (it’ll provide easy printing and a bigger space to work with):