2b302c02d9ea743878872d6619e7b264 *bt2001-09-19d2t01.shn 34c465c5fbe1c79dc2c6abc95b8deb3f *bt2001-09-19d2t02.shn f130d27e232791f49438a9d7d75fa653 *bt2001-09-19d2t03.shn 1926bc7093786ece52b59a8078692d56 *bt2001-09-19d2t04.shn 9af2864446534657e61bdf86398cbaac *bt2001-09-19d2t05.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned