The page can be seen by selecting the "Get Answers" menu from the home page of Healthcare.gov and choosing "How to appeal a Marketplace decision." Selection of the submenu items on the left return the same result.
Other problems exist on the site as well. A search for "appeal" reveals the following:
According to the website lipsum.com, the nonsense text is "simply dummy text of the printing and typesetting industry." In other words, the text is just a placeholder until the permanent information is entered.
An email to CMS requesting comment was not immediately returned. Open enrollment for 2015 is set to begin on.