Use Slots Error

message "{
  "message": "You should use slots with <ContentQuery>!"
}

• Rendered in place of content by the nuxt dev server
• Occurs after modifying a '/content' markdown file, and then page refresh
• Refreshing again yields the same message
• Navigating to another page and then returning, renders the page content as expected.
• Code appears to be correct because it renders pages without error,
• Something happening in rehydration?