I have the same issue, using the MX Master 3 mouse, I cannot scroll, I notice it in Twitter, but tried Safari as well. If I use the Apple Magic Trackpad, it all works fine.
passta
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution
Last seen
User for
Post
Replies
Boosts
Views
Activity
Booting to recovery and setting security to high and now I am able to download the update.