New Input System for Controller is not able to work with autogenerated C# class file Unity 2018.4

I am getting the following error: NullReferenceException: Object reference not set to an instance of an object PlayerControls.Initialize () (at Assets/PlayerControls.cs:22)

I am trying to move my player, but the autogenerated C# Class File for the Input Action Asset is not working or has some bug. I tried changing the code of the C# Class file but no good there. I am getting this huge headache because of this.