ee853448314aaf136db069b1dfb9ebeb *kdtu2002-12-11d02t01.shn 57489181be9cc81b00fcfb607e63b7ec *kdtu2002-12-11d02t02.shn c04554f173c56933936cd3e1a9b300c1 *kdtu2002-12-11d02t03.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned