cats2019-01-19t01.flac:a935b91b7d1015e4e990b2adba9bda0f cats2019-01-19t02.flac:635e13416641759cb81e8906a869cf37 cats2019-01-19t03.flac:5ab202944ec0e277361587c4424e46be cats2019-01-19t04.flac:a6e7ad37dd35332180f3e01eef8f3a23 App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned