How to fix 'Could not load file or assembly 'System.Web.Helpers, Version=2.0.0.0' Error with 2sxc in DNN

Question

I have a local DNN site and I am trying to use the 2sxc module to create content/apps before placing it on the actual production site. I tried to install the Razor Tutorial App

Answer 1

Did you check your web.config for something like