Object reference not set to an instance of an object - VS 2013 Community [duplicate]

This question already has an answer here:

• What is a NullReferenceException and how do I fix it? 18 answers

i installed VS 2013 Community and i wanted to make a project of Blank App (Windows Phone Silverlight) so when i click on "OK" so it's writing me Object reference not set to an instance of an object. Can anyone help me please? Thank you :)