01Track01.flac:00000000000000000000000000000000 02Track02.flac:00000000000000000000000000000000 03Track03.flac:00000000000000000000000000000000 04Track04.flac:00000000000000000000000000000000 05Track05.flac:00000000000000000000000000000000 06Track06.flac:00000000000000000000000000000000 07Track07.flac:00000000000000000000000000000000 App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned