Client Security Hash - Error

Getting this error on running the project. How to solve this.

Hi Student,

Generally this error means that you are using a variable that has not been instantiated (it does not have a value associated with it). It seems to me that something you are doing on the right side of your assign is using a variable which has no value. I would look at the code on the right side, and make sure that all the variables you are using are being set somewhere first.