Fatal error: Uncaught Error: Class "Illuminate\Database\Eloquent\Relations\Relation" not found in E:\install\laragon\www\logisoft_invoice_dev\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsTo.php:19 Stack trace: #0 {main} thrown in E:\install\laragon\www\logisoft_invoice_dev\vendor\laravel\framework\src\Illuminate\Database\Eloquent\Relations\BelongsTo.php on line 19