ebbcf2342e818c98066c9f493cba58ee [shntool] gd87-11-14d1t01.shn 71d5dd1d8a8699940eedc425bf155dfb [shntool] gd87-11-14d1t02.shn 848b4302b8b5df4b569b06f551e5a7c6 [shntool] gd87-11-14d1t03.shn 435bca96b59029e85418551dc998d89e [shntool] gd87-11-14d1t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned