Fatal error: Uncaught Error: Interface "Phpfastcache\Core\Pool\ExtendedCacheItemPoolInterface" not found in C:\xampp\htdocs\vendor\Phpfastcache\Cluster\AggregatablePoolInterface.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\Phpfastcache\Cluster\AggregatablePoolInterface.php on line 21