Hi there,
I went and took a look at your page, and it looks like you created custom links to pages which don't exist yet!
What you can do instead is create pages at:
https://mygirlabout.wordpress.com/wp-admin/edit.php?post_type=page
And once those pages are created, you can go back to the Menu page and create links to those pages which you've now created.
Let me know if you've got any additional questions!