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Basic Grid Control with Entity Framework (With Relationships) - Internal Server Error - 500


         I am trying to do a Basic MVC application with Grid Control. I followed the Tutorial Videos at . The Code looks exactly similar discussed in the video except for the Entity Framework which I used my Models. 

The Problem I faced was Grid control was not able to fetch the data from a Entity Framework Model that had relationships from the Controller. and when looking at the console found out the error as

Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Uncaught Error: The remote request to fetch data has failed: (error) undefined   - in ig.ui.min.js

  I debugged the Controller  and I can see the data that are being returned. Also I Checked out the Forums for similar posts and found out this and my problem looks  similar to what they have discussed.

 With Entity Models that has relationships, I get the above error. So I tested with a model that did not have any relationships associated with them and I was able to get grid working. 

  I am not sure what the problem is or am I missing anything ?