Just created a side menu as my first project, need help

Hello,

I just created a side menu project. I added a few pages and when I download or use ionic cli, the project when using ionic serve on my local machine defaults the url to http://localhost:8100/#/side-menu21, which is a blank page. I cannot find any page that is side-menu21.

Any help on what I'm doing wrong would be appreciated.

Thank you
Bill