I realized I should mention, that I’m building this in Divi – which might be an issue (though I realize it shouldn’t be, and in fact I created custom fields in Divi before with Piklist, no problem…)

Aha! Of course. My bad. Thanks!

Thanks Jason! I guess I’m usually installing WP via cPanel and plugins via the Dashboard, so rarely directly FTP anything to my WP directory – but I’ll make note of those permissions guidelines.

And I was looking at Wordfence as well – I’ll check both your suggestion out for sure.

Have a great day!

Glad to help the site be even better and more accurate!

All the best!

Continuing to troubleshoot, I tried simply pasting in the untouched sample code above. But now I get the following error when trying to activate it:

Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected ‘,’, expecting ‘)’ in /nfs/c01/h08/mnt/7211/domains/hons.ca/html/wordpress/wp-content/plugins/piklist-hons/piklist-hons.php on line 39

Hmmmm? Here is my current contents of the php file (with line 39 indicated by a comment):

<?php
/*
Plugin Name: HON'S Piklist 
Description: Adds custom post types and other features using the Piklist plugin.
Version: 1.0
Author: Adam Abrams
Author URI: http://www.adamabramsdesign.com
Plugin Type: Piklist
*/

  add_filter('piklist_post_types', 'piklist_demo_post_types');
  function piklist_demo_post_types($post_types)
  {
    $post_types['piklist_demo'] = array(
      'labels' => piklist('post_type_labels', 'Piklist Demo')
      ,'title' => __('Enter a new Demo Title')
      ,'menu_icon' => piklist('url', 'piklist') . '/parts/img/piklist-menu-icon.svg'
      ,'page_icon' => piklist('url', 'piklist') . '/parts/img/piklist-page-icon-32.png'
      ,'supports' => array(
        'title'
        ,'post-formats'
      )
      ,'public' => true
      ,'admin_body_class' => array(
        'custom-body-class'
      )
      ,'has_archive' => true
      ,'rewrite' => array(
        'slug' => 'piklist-demo'
      )
      ,'capability_type' => 'post'
      ,'edit_columns' => array(
        'title' => __('Demo')
        ,'author' => __('Assigned to')
      )
      ,'hide_meta_box' => array(
        ,'author'   /* THIS IS LINE 39  */
      )
      ,'status' => array(
        'new' => array(
          'label' => 'New'
          ,'public' => false
        )
        ,'pending' => array(
          'label' => 'Pending Review'
          ,'public' => false
        )
        ,'demo' => array(
          'label' => 'Demo'
          ,'public' => true
          ,'exclude_from_search' => true
          ,'show_in_admin_all_list' => true
          ,'show_in_admin_status_list' => true
       )
        ,'lock' => array(
          'label' => 'Lock'
          ,'public' => true
        )
      )
    );
    return $post_types;
  }

Thanks Steve, that looks like exactly what I need – now to work through it… slowly! 8^)