1b3793611e8f38a2d000ec85d6f71bdc *kdtu2003-04-23d201.shn 042f27e70ea477c87ce7d9602ec43ddc *kdtu2003-04-23d202.shn 61cf12f7464b486b8ac97a9ad051e608 *kdtu2003-04-23d203.shn fb677869d8d9d67f50bfc1055794499b *kdtu2003-04-23d204.shn 106a85b4be3e1b2e753efb592871e5a0 *kdtu2003-04-23d205.shn d2655cc46e13de10236e5896de07ee59 *kdtu2003-04-23d206.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned