1b1b98fd6ee8eb25c29b4d4d70db23ec *gkm2012-04-19-12d1t01.flac e6d32d2d3fa1bda9360a5d86d0182964 *gkm2012-04-19-12d1t02.flac 8cc5f3668d475b8533927e2b35840877 *gkm2012-04-19-12d1t03.flac 8f20b06a2e0c86e29a74226f1fa21c1c *gkm2012-04-19-12d1t04.flac ae8b17c17f31c3e495d3cde5544b31be *gkm2012-04-19-12d1t05.flac 0f29ce0263581d65d919fefe01e6e126 *gkm2012-04-19-12d1t06.flac App\Http\Controllers\Api\FileDownloadController::download(): Return value must be of type string, none returned