Info field throws error: Undefined variable: page

title: Item Page

options:
  duplicate: true

columns:
  left:
    width: 2/3
    sections:
      content:
        type: fields
        fields:
          description: 
            label: Description
            type: textarea
            size: small
            help: This intro text, underneath the page heading, is also used for the meta description (between 120–168 characters) keep your most important text (keywords) within this range.
          cover:
            label: Cover
            type: files
            multiple: false
            width: 1/3
            layout: cards
            size: tiny
            cover: true
            ratio: 3/2
            template: image
            help: Select a cover image
          text:
            label: Text
            type: textarea
            size: large
          test:
            label: test info
            type: info
            text: test 
          galleryHeadline:
            label: Gallery  {{ gallery }}
            type: headline
            numbered: false
          gallery:
            label: Gallery images
            type: files
            query: page.images
            help: Select images and place the tag {{ gallery }} anywhere in your text to use the gallery
          gallerycaptions:
            label: Display gallery captions?
            type: toggle
            help: Display captions underneath the thumbnails. Captions, if any, will always be displayed in the lightbox view.
          
  right:
    width: 1/3
    sections:
      fields:
        type: fields
        fields:
          date:
            label: Published on
            type: date
            time: true
          displaydate:
            label: Display date?
            type: toggle
            icon: calendar
          author:
            label: Author
            type: users
            multiple: false
          displayauthor:
            label: Display author?
            type: toggle
            icon: user
          tags: true
      pages:
        type: pages
        headline: Subpages
        info: "{{ page.children.count }}"
        template: item-page
      files:
        type: files
        label: Images
        query: page.images
        template: image

I’m not sure if this is useful without proper indentation …