Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\Relation" not found in D:\Apache24\www\pda\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php:16 Stack trace: #0 {main} thrown in D:\Apache24\www\pda\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsToMany.php on line 16