@salias's suggestion is exactly correct - but I'm curious where you found that initial URL? I ask because 2021.11 was prior to the release of ancom-bc in QIIME 2 (and the da-barplot viz), so we shouldn't have any URLs associated with those outputs from 2021.11!
Thanks, this was helpful! It looks like we hadn't updated the base URL used to generate all of our URLs for the multi-interface moving pictures tutorial (those are generated automatically, while we do a manual version bump for the rest of our tutorial URLs). I've opened a PR for this and am currently re-building the docs, so a fix for this should be live by EOD!