Fatal error: Uncaught Error: Interface "Psl\Collection\CollectionInterface" not found in C:\xampp\htdocs\hannoole\PMS\vendor\azjezz\psl\src\Psl\Collection\MutableCollectionInterface.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\PMS\vendor\azjezz\psl\src\Psl\Collection\MutableCollectionInterface.php on line 22