Edit File: class-oembed.php
<?php /** * API for fetching the HTML to embed remote content based on a provided URL. * * This file is deprecated, use 'wp-includes/class-wp-oembed.php' instead. * * @deprecated 5.3.0 * @package WordPress * @subpackage oEmbed */ _deprecated_file( basename( __FILE__ ), '5.3.0', WPINC . '/class-wp-oembed.php' ); /** WP_oEmbed class */ require_once ABSPATH . WPINC . '/class-wp-oembed.php';