Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\BelongsTo" not found in D:\programs\xampp\htdocs\backend-test\vendor\mongodb\laravel-mongodb\src\Relations\BelongsTo.php:16 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\backend-test\vendor\mongodb\laravel-mongodb\src\Relations\BelongsTo.php on line 16