Get data of relation from Query function

Hi everyone i need to get tag name in relation tasktags using query but I get an error

Undefined property: Illuminate\Database\Eloquent\Builder::$name

$posts2 = Path::with(['pathtags' => function ($q) use ($TagArray) {
$q->with(['Tasks'=>function($q) use ($TagArray) { 
$q->has('tasktags', '=' , 2)->whereHas('tasktags', function ($query) use ($TagArray) {
        $TaskTags[] = $query->name;
     })->with('tasktags');
  }]);
}])->first();

via Chebli Mohamed