um2013-08-18mk4t01.flac:3675d1012af669e31b23cd88a0e1774a um2013-08-18mk4t02.flac:f6883214a3720aa5539b9e5e592c3a3c um2013-08-18mk4t03.flac:ebbb51031d255d0d939ad21ee2b56be1 um2013-08-18mk4t04.flac:dc4daccfb3181df837f8f17d61335959 um2013-08-18mk4t05.flac:0e3784b7b8e9b9c043b653f7ecc7ee12 um2013-08-18mk4t06.flac:b1bf27e98cff08bcd60030605f822962 um2013-08-18mk4t07.flac:f859877356e6fb2cd4c7cc0d49e3b570 um2013-08-18mk4t08.flac:9463aac298b71db462f8f48487eab483 um2013-08-18mk4t09.flac:42806a481012d0f52dfbc2e24e21d48b um2013-08-18mk4t10.flac:00d2e3547be8ff84a00cac36b1ab31b7 um2013-08-18mk4t11.flac:69d2337428ce7b9a70b91044dee5aa63 App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned