For some reason, some of my Piklist post types keep crashing my websites if both the plugin that creates the post type and the piklist plugin are on. Below is a simple plugin that creates a post type that breaks the site with the FATAL error if used with Piklist.

<?php
//ADD SPOTLIGHT POST TYPE
add_filter('piklist_post_types', 'spotlight_videos_post_type');
 function spotlight_videos_post_type($post_types)
 {
  $post_types['spotlight_videos'] = array(
    'labels' => piklist('post_type_labels', 'Spotlight Video')
    ,'title' => __('Enter a new Spotlight Video')
    ,'public' => true
    ,'menu_icon' => 'dashicons-video-alt2'
    ,'capability_type' => 'spotlight_videos'
  ,'capabilities' => array(
    'publish_posts' => 'publish_spotlight_video'
    ,'edit_posts' => 'edit_spotlight_video'
    ,'edit_others_posts' => 'edit_others_spotlight_videos'
    ,'delete_posts' => 'delete_spotlight_videos'
    ,'delete_others_posts' => 'delete_others_spotlight_videos'
    ,'read_private_posts' => 'read_private_spotlight_videos'
    ,'edit_post' => 'edit_spotlight_video'
    ,'delete_post' => 'delete_spotlight_video'
    ,'read_post' => 'read_spotlight_video'
  )
    ,'rewrite' => array(
      'slug' => 'spotlight_videos'
    )
    ,map_meta_cap => true
    ,'supports' => array(
      'title'
      ,'editor'
      ,'author'
      ,'revisions'
      ,'thumbnail'
    )
    ,'hide_meta_box' => array(
      'slug'
      ,'author'
      ,'revisions'
      ,'comments'
      ,'commentstatus'
    )
  );
return $post_types;
}
?>