4002f65d9676a7c024a7c5616acb0bc1 *kdtu2002-06-21d1t04.shn 8adfa91d05530d29d677145946a1d2e3 *kdtu2002-06-21d1t02.shn e86aa942657577e6adfe1f9625fa061f *kdtu2002-06-21d1t03.shn 43a894a6892563a408568d894842a8a5 *kdtu2002-06-21d1t01.shn 9c30a32ea3d255ac9d1daccefcc2e01e *kdtu2002-06-21d1t05.shn 71429014b939936f30d89c133c352e12 *kdtu2002-06-21d1t06.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned