Steps to reproduce
Using Unity 2018.4
Follow this step in the README:
2.2.1 - [if your Unity version is 2018.x.x] Make sure that under Edit -> Project Settings -> Player the Configuration -> Scripting Runtime Version is set to .NET 4.x Equivalent.
Expected behavior
There is a Configuration section in the UI
Actual behavior
There is no Configuration section in the UI

Note
I don't know if this is a problem or not. I don't know what Scripting Runtime Version it's using by default.