Fatal error: Uncaught Error: Interface "SimplePie\Cache\NameFilter" not found in C:\xampp\htdocs\Learn\wp-includes\SimplePie\src\Cache\CallableNameFilter.php:52 Stack trace: #0 {main} thrown in C:\xampp\htdocs\Learn\wp-includes\SimplePie\src\Cache\CallableNameFilter.php on line 52