Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\Relation" not found in D:\Application\www\Training\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\HasOneOrMany.php:9 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\HasOneOrMany.php on line 9