安装Feeds Excel Parser和Feeds XLS后，我收到错误
Fatal error: require_once(): Failed opening required
'sites/default/libraries/PHPExcel/PHPExcel/IOFactory.php' (include_path='.;C:\xampp\php\PEAR') in
C:\...\sites\all\modules\feeds_xls\feeds_xls.template.inc on line 34