Tag cloud - 404

I go to the link on the tag under the post type http://habrahabr.ru/tag/yii/ . Above the list of posts I see a form to the left of which is an arrow and a little cloud-link “go to the page with all the marks” - go to this page and see a bulging eye with green tentacles trying to suck the brain out of a dissatisfied head 404 page not found.