Fatal error: Uncaught Error: Interface 'Illuminate\Session\ExistenceAwareInterface' not found in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Session\DatabaseSessionHandler.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Session\DatabaseSessionHandler.php on line 14