This page isn't quite the page hosting your municipality's minutes or agendas yet. There's a link to that page here, though.
Please click the link that says "Archive" or similar on this page, then run the extension again on that page.
If this page doesn't actually have an "Archive" or similar link, it probably needs a custom scraper. When you log the ticket, please mention you saw the wrong message from the Chrome extension on the page.