I have an admin page for some settings. At the top of the page, I get this error: Notice: Undefined index: layout in plugins/piklist/includes/class-piklist-workflow.php on line 594. I’m getting the same error on a number of different project, though I’m using basically the same setup as below. Does this mean I’ve left something out, or do you think it’s a bug?

My admin page setup looks like:

add_filter('piklist_admin_pages', function ($pages) {
    $pages []= [
        'page_title' => 'Filter Settings',
        'menu_title' => 'Filter Settings',
        'capability' => 'manage_options',
        'menu_slug' => 'of_settings',
        'setting' => 'of_settings',
        'menu_icon' => WordPress::assetUrl("assets/images/filters-16x16.png"),
        'page_icon' => WordPress::assetUrl("assets/images/filters-32x32.png"),
        'single_line' => true,
        'default_tab' => 'General',
        'save_text' => 'Save Settings',
    ];

    return $pages;
});

I have a few tabs. The settings file headers look like:

my_plugin/parts/settings/general.php:

/*
Title: General
Tab: General
Tab Order: 100
Setting: of_settings
Order: 20
*/

my_plugin/parts/settings/sort.php:

/*
Title: Sorting
Tab: Sorting
Tab Order: 300
Setting: of_settings
Order: 20
*/