Error na sttronie

Witam wyskoczył mi taki bład: ktoś pomoże?

Warning: require_once(/home/tradehouse/ftp/wp-includes/widgets/class-wp-widget-media.php): failed to open stream: No such file or directory in /home/tradehouse/ftp/wp-includes/default-widgets.php on line 18

Fatal error: require_once(): Failed opening required '/home/tradehouse/ftp/wp-includes/widgets/class-wp-widget-media.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/tradehouse/ftp/wp-includes/default-widgets.php on line 18