members does not show up at front-end in multisite

Hello,

I assign User Role of subscriber to default member type, and enable directory, but the members does not show up at front-end member directory, and it just show 0, please check here:https://prntscr.com/en0el2

I activated Buddypress in a sub site of Multisite, and make this subsite as main site to Buddypress by following B of Buddypress official documentation at https://codex.buddypress.org/getting-started/installation-in-wordpress-multisite/

Alex