9e07ef1628a8bc45e85956a0534599f8 *SCI2001-04-18d3t1.shn 7650e6cba761d8daa8666dde3fa0889f *SCI2001-04-18d3t2.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned