Disqus decided to introduce some bs affiliate links (via https://disq.us/url → https://redirect.viglink.com). uBlock blocks this, so you won’t ever get to where you want to go.
If you log in with a Disqus account, you may also be turn it off.
When you’re at the “Page Not Found” screen, just click on this bookmarklet to continue to the actual link target.
javascript:location.replace(location.search.substring(1).split("&").reduce((prev, curr) => {let x=curr.split("="); prev[x[0]]=decodeURIComponent(x[1]); return prev;}, {}).u)
Drag this code to your bookmarks toolbar and give it an appropriate name.
Tested on Firefox
Thank you, very usefull