Fatal error: Uncaught Error: Class 'SimplePie\File' not found in C:\xampp\htdocs\misc_white_butterfly\wp-includes\class-wp-simplepie-file.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\misc_white_butterfly\wp-includes\class-wp-simplepie-file.php on line 19