Bug: When viewing orders in admin, PHP notice is coming up

[radykal]

Hi,

there is a PHP notice with orders that were created before using Dokan.

PHP Notice: Trying to get property 'display_name' of non-object in /wp/wp-content/plugins/dokan-master/includes/admin-functions.php on line 117

That should fix the error:
$seller = get_user_by( 'id', dokan_get_seller_id_by_order( $post->ID ) ); if( $seller ) { printf( '<a href="%s">%s</a>', esc_url( admin_url( 'edit.php?post_type=shop_order&vendor_id=' . $seller->ID ) ), esc_html( $seller->display_name ) ); }