Why is an empty string displayed instead of custom type materials (Drupal 7)?

Question

CMS

Good afternoon!
The essence, in general, is formed by the title.
I'm learning Drupal. I created my own type of material, created three test materials, created a representation for the material with display on special. page, and... nothing. No material is displayed, just emptiness. If you open the created material itself using the generated link, the same thing - the title, and under it there is emptiness. I don’t understand where to dig ... tell me, please, what could be the problem. Thank you.
PS Did according to the manual

Answer 1

Are you displaying stuff with the Views module?