Please download Rhino 7.7 (or later) for your deployments.
The problem happens when users click the Gear icon next to the Install button, then click “Download packages for offline installation.” It currently fails to verify the .NET 4.8 package that it downloads.
This is because a week ago, Microsoft replaced the .NET Framework redistributable downloads with versions that are signed with SHA-2-based certificates. Unfortunately, they replaced them at the same URLs as the ones signed with SHA-1-based certificates so our installer’s payload validation fails.
If you have a build of the .NET 4.8 installer (v4.8.3928.0) that you downloaded prior to last week, please reply here. I think we can work around this problem if that file can be downloaded from somewhere other than Microsoft. It will be in a
redist, and is named
ndp48-x86-x64-allos-enu.exe folder that you created when trying to create the offline installation.