Shortcut stopped working

One of Atom shortcuts just stopped working. I don’t get why and can’t enable it again. See my Key Binder Resolver screenshot.

  1. Place a cursor in the Markdown file you are trying to preview.
    That means… activate the editor.

  2. Use the shortcut.

  3. What happens now?
    Does the Markdown preview open?

Jeez. It does. Thank you sm!