After installing Articulate on a new project, when I tried to load the 'Settings' section within the Umbraco back-end I start getting this error:

After a lot of head-scratching, uninstalling plug-ins and e=installing I was able to figure out the issue was a dependency injection issue.  Within my project, I was using Autofaq and the Articulate assembly needs to be registered within the DI set-up code, otherwise, it errors.

To register articulate with Autofaq within your DI set-up, you will need to add some code similar to the snippet below:

After registering Articulate with the 'RegisterApiControllers', when you rebuild your solution, the error should go away.