lost document error 43

A Pages document must be formally saved just once to trigger subsequent autosaves of changes in that document. It cannot be left as Untitled.pages without that initial save to a proper document name, or when one quits Pages, the document content is lost for good.

One cannot depend on the list of recently opened documents to automatically update when formally named documents are deleted.

If neither of the preceding paragraphs apply, then see if you can recover the Pages document from a recent Time Machine backup.

Personally, I do not use the Recents in Finder. Too darn confusing. I have the following settings, and never allow Recents to be seen in the Finder:

Finder Preferences

1. General
   1. New Finder windows show: [ house icon - short user name]
   2. [√] Open folders in tabs instead of new windows
2. Sidebar (selected):
   1. Favorites
      1. Applications
      2. Desktop
      3. Documents
      4. Downloads
      5. Movies
      6. Music
      7. Pictures
      8. house icon
   2. iCloud (selected)
      1. iCloud Drive
   3. Locations (selected)
      1. Computer name
      2. Hard disks
      3. External disks
      4. CDs, DVDs, and iPods
      5. Bonjour computers
      6. Connected Servers (will show my Synology NAS)
3. Advanced
   1. Keep folders on top:
      1. [√] In windows when sorting by name
      2. [√] On Desktop
   2. When performing a search:
      1. [ Search the Current Folder ]