2121520e5239327c0c33c855519390a4 [shntool] gd78-09-13d1t1.shn 5e04ab726ceb1dc1d7e299c777e67650 [shntool] gd78-09-13d1t2.shn adb1f1732e96f2326c5dea4884b1a12f [shntool] gd78-09-13d1t3.shn 60ba7d95f3d4f2b7947bdf9163885d2d [shntool] gd78-09-13d1t4.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned