Using in ‘category_name’ in ‘$query->set();’?

I am unable to duplicate the problem, but the Notice references this line:

add_screen_option( 'per_page', array( 'label' => $title, 'default' => 20, 'option' => 'edit_' . $post_type . '_per_page' ) );

And that makes me think that you should be passing a post type in your GET string.

http://wp.dev/wp-admin/edit.php?post_type=post&category_name=intl

Just a guess as I can’t duplicate the issue. If that doesn’t move you forward I will delete the answer 🙂

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