instance method unverified_request_warning_message

# File actionpack/lib/action_controller/metal/request_forgery_protection.rb, line 544
      def unverified_request_warning_message
        if !valid_request_origin?
          "HTTP Origin header (#{request.origin}) didn't match request.base_url (#{request.base_url})"
        elsif sec_fetch_site_value == "cross-site"
          "Sec-Fetch-Site header (cross-site) indicates a cross-site request"
        elsif using_header_only_for_forgery_protection?
          "Sec-Fetch-Site header is missing or invalid (#{sec_fetch_site_value.inspect})"
        else
          "Can't verify CSRF token authenticity."
        end
      end