Fatal error: Uncaught Error: Call to undefined function add_filter() in C:\xampp\htdocs\WAIT FOR DELETE\wp-content\plugins\jetpack\modules\shortcodes\youtube.php:109 Stack trace: #0 {main} thrown in C:\xampp\htdocs\WAIT FOR DELETE\wp-content\plugins\jetpack\modules\shortcodes\youtube.php on line 109