12458513b787ce26f2cfcb9da8f9d320 *um2000-09-09d2t01.shn c5058bd0a04257ddc2890fa45470ed2b *um2000-09-09d2t02.shn 286794ed8911fa0218e3d06e5702b35f *um2000-09-09d2t03.shn 12a9d6afac70830724d6f8a6082a9f72 *um2000-09-09d2t04.shn 9db60bb86359a41f9b81b2ca60187ba4 *um2000-09-09d2t05.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned