92be29509ef7b6e9309d0e0a48b7957f *kdtu01-02-12d2t01.shn 0cf60d1396737f7fac5751baf70df57b *kdtu01-02-12d2t02.shn 5756e8ae7b2209a165b455d7b21ae5bf *kdtu01-02-12d2t03.shn e95402d04cdcd5f1c6ebb5c1017d0936 *kdtu01-02-12d2t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned