BuddyPress.org

@shahriar83 seems working fine with Flatsome if you have not customized any template inside child theme
https://drive.google.com/a/wbcomdesigns.com/file/d/1QkXAnrqFYFKV3kLu47QQ0hiBD7TJZIfz/view?usp=drivesdk try to deactivate other bp related plugins to debug the issue.

I had some issues with this earlier too, using the code supplied in this thread should clear up your issue.

Here’s the code if you’re unable to click the link for some reason. You should put it in your bp-custom.php file.

function toa_check_page_reqiurement_and_lie_to_buddypress ($is, $component) {
    global $bp;
    if ($is || "activity" !== $component) return $is;
    if ((defined('BP_GROUPS_SLUG') && bp_is_groups_component() && 'activity' == $bp->current_action)){
        return true;
    }
    return $is;
}
function toa_setup_activity_filter () {
    add_filter('bp_is_current_component', 'toa_check_page_reqiurement_and_lie_to_buddypress', 10, 2);
}
function toa_teardown_activity_filter () {
    remove_filter('bp_is_current_component', 'toa_check_page_reqiurement_and_lie_to_buddypress', 10);
}
add_action('bpfb_init', 'toa_setup_activity_filter');
add_action('bpfb_add_cssjs_hooks', 'toa_teardown_activity_filter');

@jonaskjodt that’s very old thread and different topic. There are some structural changes inside the template files and actions are also updated.

Keep eye on https://wordpress.org/support/topic/buddypress-activity-plus-plugin-issues/ thread. That’s all you have to do