2d35895706518f401b6819e1651c6f97 *kdtu2000-02-11d2t01.shn 30f48a0234b0c97dd5c602aafe8cb902 *kdtu2000-02-11d2t02.shn 6cf82e378d4758424e3916b5d3d49d3f *kdtu2000-02-11d2t03.shn 2f82d6ebc4fef0058ca9c68fcbbcbeb1 *kdtu2000-02-11d2t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned