Commented Unassigned: How to fix "object reference not set to an instance of an object" [2301]

I'm calling the search function
var tweets = Search.SearchTweets(searchParameter);

I cannot figure out the problem and how could I fix it
Comments: ** Comment from web user: linvi **

Well it probably mean that the result (tweets) is null. This happen when an error occurs to connect to the Twitter API.

Please check your ExceptionHandler.GetLastException and let me know what you find there.

Linvi