Fatal error: Uncaught Error: Class 'Ramsey\Collection\Map\AbstractMap' not found in C:\xampp\htdocs\admin\vendor\ramsey\collection\src\Map\NamedParameterMap.php:31 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\ramsey\collection\src\Map\NamedParameterMap.php on line 31