Newly added views result in "page not found" (Drupal 7)

I've been working on this project for a few weeks now. I've already been using views without any problems. I went to add a new one today, very simple, just displayed a list of one content type. But when I try to navigate to the view's page, I get a 404 "page not found." error. All views I have created up to this point still work fine, even after editing them and saving them again.

Yes, I clicked "Save." AND I cleared all caches. No luck :(

Any ideas?