No alternate text on one image. Many HTML problems in weblint report. One image missing. Footnotes.html should have been named with a lowercase f. Footnote 3 link in Footnotes.html does not link to a named anchor in the main document. No footnote 1 in main document.
Black background makes most text invisible.
23 Document needs a title. Could use a level 1 heading at the top. Could have a more descriptive title. URL of pixel GIF is wrong, so the color does not load. Title could have been more descriptive.