Fatal error: Uncaught Error: Class 'Barryvdh\Debugbar\ServiceProvider' not found in C:\Apache24\htdocs\vendor.old\barryvdh\laravel-debugbar\src\LumenServiceProvider.php:7 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\barryvdh\laravel-debugbar\src\LumenServiceProvider.php on line 7