8a453e849bf567085a8fe44505661b15 wu00-07-01d2t01.shn a4bcce9ccdcdd26d38ceecd9717b01bb wu00-07-01d2t02.shn 201ab1261d29e6f8cd712b2e9e91223c wu00-07-01d2t03.shn 4d6d8d14031707c0c1442f12e535670b wu00-07-01d2t04.shn App\Http\Controllers\Api\ChecksumDownloadController::download(): Return value must be of type string, none returned