4586ff9456c4253f144b60c3a7c609c2 *d1990-12-00t02.shn 5ef0c2e8ebfacf90a1b47811aa4b7d4d *d1990-12-00t01.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned