Runtime Error on Google Map Image

there is a runtime error each time i run your example files

1. Solution exception:Could not load file or assembly 'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The system cannot find the file specified.

i haven't tried other components. i'm currently trying to use a google image on my viewport so i can trace the map.

in case you wonder why i don't ask local goverment to give me their geo cad data is because they don't have detailed information, just road and districts, some buildings is not updated

i'm currently studying urban in my local area using parametric approach.

i'm using Rhinoceros3D 5 SP 7 64-bit

running on Grasshopper Build 0.9.0070