Fatal error: Uncaught Error: Class 'League\Flysystem\Adapter\AbstractAdapter' not found in C:\xampp\htdocs\admin\vendor\league\flysystem\src\Adapter\Local.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\league\flysystem\src\Adapter\Local.php on line 18