If I try to directly view this question, I get a redirect message (both in Chrome and Firefox, on Windows 10): Convert kWh to Watts per m²
I cleared cookies as suggested and there was no change in behavior. I also observe the same issue in Chrome and Firefox on Android.
If I search for the question and find a link to one of the answers, I can view it no problem.
Others in the comments report the same issue, and on a similar question on MSO, a developer reproduced the issue.
I also discovered that if I switch my phone from WiFi to cellular data, I can open the link.