278a0c0af3a0b34dc2de1bc843395a97 [shntool] gd67-01-14d1t01.shn 3e4672daf7c188489fee4e7047591c64 [shntool] gd67-01-14d1t02.shn 2b7e984e9e165e855425bd99e72d41be [shntool] gd67-01-14d1t03.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned