@LoriDelacruz_Lewis -- I'm only somewhat familiar with the Wave tool, but I'm not sure why it would report these particular errors.
You have several headings and subheadings in your story, and they are correctly tagged in the HTML as heading elements (<h2>, <h3>, etc.).
The page has regions defined by aria roles such as navigation (story navigation bar), banner (header), and contentinfo (footer).
Owen Evans
Lead Product Engineer | StoryMaps