1. As an admin, go to the path's page and click on the three dots to reveal a drop-down menu. Then click on Edit this Path.
2. Hover over the resource and click on the cog icon.
3. From this page, you'll be able to set a notification start date and/or a due date notification. By setting these dates, an email notification will be sent to the users on that date.
4. When complete, click the Save button.
5. Be sure to publish the path again when all edits are done.