I'm trying to upgrade MacOS to Catalina. The link that DesktopCentral is using to download the file "installCatalina.tar.gz" is https://updates.cdn-apple.com/2018/091-99991-20181030-10052238-C103-11E8-A480-9257C82E983B/installCatalina.tar.gz. But that link just has a Access Denied page. 

(I'm on DC version 10.0.475)

Thanks