I made some progress...
This site helped a lot:
stackoverflow.com/.../http-error-500-19-and-error-code-0x80070021
Specifically...
Windows Server 2016, IIS 10.
Went to server manager, click add roles and features
In the roles section choose: Web ServerUnder Security sub-section choose everything
Under Application Development choose .NET Extensibility 4.6, ASP.NET 4.6 and both ISAPI entries (you may get asked to add when ASP.NET 4.6 is checked)
In the features section choose: NET 3.5, .NET 4.6, ASP.NET 4.6
In the web server section choose: Web Server (all), Management Tools (IIS Management Console and Management Service)
After doing this I have an Aras login screen and able to login.
