Hi! I saw what seemed to be a very similar issue to mine, posted quite recently:

https://piklist.com/support/topic/changing-admin-menu-for-custom-admin-pages/

I’m having the same issue though I am following the documentation to the letter. No extra commas or anything… 8^)

Here’s the code in my functions.php file:

/* Add a page in the Dashboard where we can add custom code for a web ad  */

add_filter('piklist_admin_pages', 'my_admin_pages');

function my_admin_pages($pages) {

    $pages[] = array(
      'page_title' => 'Banner ad'
      ,'menu_title' => 'Manage'
      ,'menu_slug' => 'manage_ad_html'
      ,'capability' => 'manage_options'
    );

    return $pages;
  }

…but no “Banner ad” menu appears in my Dashboard.

Can you advise? Thanks!