Fatal error: Uncaught Error: Interface 'SimplePie\Cache\Base' not found in C:\xampp\htdocs\school\care\wp-includes\class-wp-feed-cache-transient.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\school\care\wp-includes\class-wp-feed-cache-transient.php on line 18