Fatal error: Uncaught Error: Class 'Illuminate\Database\Eloquent\Relations\BelongsToMany' not found in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\MorphToMany.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\MorphToMany.php on line 9