Please, see the section "Algorithms versions and options". Right now I see the HTML code
'<img src="http://i.imgur.com/fztXmYOm.png" alt=""Adaptive Lebesgue Integration Mind-map""/>"
instead of the mind-map image. Since the not-working-fragment is using an imgur.com link, I decided try the work-around of uploading the mind-map image directly into community.wolfram.com and that worked.