I have opened the new project screensaver and even if in the guide it is written:

Once your project is loaded into the Visual Basic environment, you can compile and run the program in one step.

To build and run the Screen Saver application

• Press F5 tobuild and start the screen saver under thedebugger.

The screen saver launches and starts displaying the most recent articles from the RSS feed. Pressing a key or moving the mouse causes the screen saver to exit

I have the following error:

A first chance exception of type 'System.Configuration.ConfigurationErrorsException' occurred in System.Configuration.dll

A first chance exception of type 'System.InvalidOperationException' occurred in screensaver1.exe

Why?