Fatal error: Uncaught Error: Class "Laravel\Roster\Scanners\PackageScanner" not found in C:\wamp64\houda\vendor\laravel\roster\src\Scanners\ComposerLock.php:10 Stack trace: #0 {main} thrown in C:\wamp64\houda\vendor\laravel\roster\src\Scanners\ComposerLock.php on line 10