cats2016-11-25t01.flac:c456e977b8024a70a6dcdf4009f5dc74 cats2016-11-25t02.flac:0cf18f3de0cad5e73538327989c38f55 cats2016-11-25t03.flac:f82a63ad910cf53c06779fb765ff2e8f cats2016-11-25t04.flac:5f72b9e960951c955d2962f3170d54c1 App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned