Post.php goes blank

Howdy all. I just added a custom post type to my wordpress. Here’s the code (generated with GenerateWp.com)

// Register Custom Post Type
function custom_post_type() {

$labels = array(
‘name’ => _x( ‘Logos’, ‘Post Type General Name’, ‘text_domain’ ),
‘singular_name’ => _x( ‘Logo’, ‘Post Type Singular Name’, ‘text_domain’ ),
‘menu_name’ => __( ‘Logo’, ‘text_domain’ ),
‘parent_item_colon’ => __( ‘Parent Logo:’, ‘text_domain’ ),
‘all_items’ => __( ‘All Logos’, ‘text_domain’ ),
‘view_item’ => __( ‘View Logo’, ‘text_domain’ ),
‘add_new_item’ => __( ‘Add New Logo’, ‘text_domain’ ),
‘add_new’ => __( ‘New Logo’, ‘text_domain’ ),
‘edit_item’ => __( ‘Edit Logo’, ‘text_domain’ ),
‘update_item’ => __( ‘Update Logo’, ‘text_domain’ ),
‘search_items’ => __( ‘Search Logo’, ‘text_domain’ ),
‘not_found’ => __( ‘No logos found’, ‘text_domain’ ),
‘not_found_in_trash’ => __( ‘No logos found in Trash’, ‘text_domain’ ),
);
$args = array(
‘label’ => __( ‘logo’, ‘text_domain’ ),
‘description’ => __( ‘Product information pages’, ‘text_domain’ ),
‘labels’ => $labels,
‘supports’ => array(‘thumbnail’, ‘title’),
‘taxonomies’ => array(),
‘hierarchical’ => false,
‘public’ => true,
‘show_ui’ => true,
‘show_in_menu’ => true,
‘show_in_nav_menus’ => true,
‘show_in_admin_bar’ => true,
‘menu_position’ => 5,
‘menu_icon’ => ”,
‘can_export’ => true,
‘has_archive’ => true,
‘exclude_from_search’ => false,
‘publicly_queryable’ => true,
‘capability_type’ => ‘page’,
);
register_post_type( ‘logo’, $args );

}

// Hook into the ‘init’ action
add_action( ‘init’, ‘custom_post_type’, 0 );

My problem is, after I upload and add a featured image to the post, the image isn’t displayed in the Featured Image Area, only after I hit the refresh button.

That’s not the biggest problem – but after this step If I use the Update button from the post – the page turns blank.

A little help please.