Activate the Subscribe Widgets - Home and Sidebar

1. Go to Layout and open the "Join the squad!" widget (and "Join the squad!" from the sidebar).
2. Click on "View stats and learn more.".
3. Click on your feed.
4. Go to Publicize (on top) -> Email subscriptions (on the left).
5. If it's not activated, click on "Activate" (or "Save").
6. Exit the page and save the widget.