I believe that it is failing to load because of the line 282 in class_bpfb_binder.php:_add_js_css_hooks:
// Load the scripts when Activity page is the Home page
(defined(‘BP_ACTIVITY_SLUG’) && ‘page’ == get_option(‘show_on_front’) && is_front_page() && BP_ACTIVITY_SLUG == get_option(‘page_on_front’))
The function is_front_page() returns false even though the activity page is configured to be the front page. Removing that condition allows activity plus to show up on the page, although Im not sure if that would break anything else, and Im not sure why is_front_page() is returning false in the first place.
I saw some posts that suggested inserting wp_reset_query() before the call to is_front_page(), but I tried this and it did not seem to help.
Thanks,
J