With the C# Facebook SDK, I am unable to run my application when it’s on my staging domain (mathias.testing.fablelane.com), but I can run it just fine on my main domain (http://fablelane.com). It contains the exact same codes.
It’s a Facebook application that uses the C# Facebook SDK to authenticate a user. When I sign in through my staging domain, I receive the following exception:
'Facebook.JsonObject' does not contain a definition for 'id'
In my Facebook settings, I have the following specified.
It seems to me that your error is the same you find in Here
The workaround is to download the latest version of the framework..