"MessageNotUnderstood: receiver of "new" is nil " error while trying to load an application in zinc

Hi all

I am an undergrad student just starting out in Pharo and seaside. I wrote a small program and registered it using the command WAAdmin register: self asApplicationAt: 'TestApplication' in the initialise method of the view component of the application. This registers the application but i get the following error when I try to open the application through the browser.

Kindly tell me how I could fix this.

Thanks