Silly mistake – how to fix?

So I manually installed WordPress (no I did not FTP). For whatever reason – I didn’t remember I could do that until like half way through. So yeah that was fun! WordPress guys you rock because those files are packed!

Anyway – everything seems to be working great except any additional pages I create (like an About page) won’t display. File not found.

I’ve reviewed all the places I think I could be missing a file and everything looks okay. Does anyone know which file I might be missing?