Fatal error: Uncaught Error: Class "SimplePie\File" not found in D:\XAMPP\htdocs\UTeM\penerbit\wp-includes\class-wp-simplepie-file.php:19 Stack trace: #0 {main} thrown in D:\XAMPP\htdocs\UTeM\penerbit\wp-includes\class-wp-simplepie-file.php on line 19