Fixing an error

Question

Hi,

I have created a shopping cart for an online food ordering system. I have placed a link button named "Back To Menu". If I click on Back To Menu, the page will be directed to the restaurant menu page. The problem is, the moment I click on the link button I am getting an error something like given below

 

"Object Instance not set to an instance of an object".

 

The code on the link button is:-

Response.Redirect("RestaurantPage.aspx");

 

Can anyone help me fix this error?