Error

Hello, I'm new to Heron and I tried to follow the demonstration video I found on the internet but I keep recieving this error:

1. Solution exception:Could not load file or assembly 'Newtonsoft.Json, Version=6.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The system cannot find the file specified.

I would appreciate some help, thanks.

F