Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\BelongsToMany" not found in E:\Ampps\www\CAS\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\MorphToMany.php:9 Stack trace: #0 {main} thrown in E:\Ampps\www\CAS\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\MorphToMany.php on line 9