Just reporting an error message; functionality is fine. I’m running Piklist 0.9.9.8 and WP 4.5.2. I have Justin Tadlock’s Members plugin installed.

I click on the Users/Roles menu in the admin sidebar, and then select Administrator as the role to edit. I get 4 copies of this error message:

Notice: Trying to get property of non-object in /Users/donna/Sites/coloma/wp-content/plugins/piklist/includes/class-piklist.php on line 1019

That code is in function validate_part_parameter, case ‘template’:

$page_template = ($post->post_status == 'auto-draft') ? 'default' : strtolower(str_replace('.php', '', get_post_meta($post->ID, '_wp_page_template', true)));

HTH,
Donna