BuddyPress.org

That happens when there’s no ` `before the closing “ in theme’s footer.php, But since you already mentioned that you’ve using bp-default theme (which you activated in Appearance > Themes) then lack of wp_footer is not the problem. Some thoughts:
– Re-upload BuddyPress plugin files via FTP
– Deactivate all plugins (including mu-plugins) except BuddyPress, and see if same behavior applies.