a057bf3ba16d6294185b530767913e30 *sts901-07-06d2t01.shn 297de542cc83343f274a55c6417dc734 *sts901-07-06d2t02.shn a288dee219b96f9d4b316dbf19dbbb70 *sts901-07-06d2t03.shn 8f980c5be053c4b50060ccb0d49e1ed0 *sts901-07-06d2t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned