The exact error message:
The request was aborted: Could not create SSL/TLS secure channel.
The fix:
(See here instead if running NSUI in Wine: https://gist.github.com/bmaupin/93d31e1b2d738ae656b9d3617e19622b)
- Install .NET 4.6 (a later version may work, an earlier version such as .NET 4.5 will not)