Edit File: class.wp-styles.php
<?php /** * Dependencies API: WP_Styles class * * This file is deprecated, use 'wp-includes/class-wp-styles.php' instead. * * @deprecated 6.1.0 * @package WordPress */ _deprecated_file( basename( __FILE__ ), '6.1.0', WPINC . '/class-wp-styles.php' ); /** WP_Styles class */ require_once ABSPATH . WPINC . '/class-wp-styles.php';