@ yael xu
Connections supports creating multiple directories, per page. Putting the shortcode on the homepage is attempting to use that page as a directory which does not work in this case. What you need to do to resolve this is use the home_id shortcode option on the shortcode on the homepage. Add
home_id=x to the existing shortcode on the page where
x is the page ID assigned to the directory page by WordPress.
Hope this helps, let me know.