Did you get a browser error when trying this? It might be because you left the www in the URL. I had to remove that and replace it with old, and it works. The rest of the link structure is the same on both old and new reddit. I even tried it from a VPN just to be sure it wasn’t seeing my logged in cookies, and in a private browsing window where RES isn’t allowed to run. Worked fine.
You can also play with it to try and get closer to correct. I had problems with getting an Excel macro working and getting unattended-updates working on my pihole. GPT was wrong at first, but got me partly there and I could massage the question and Google and get closer to the right answer. Without it, I wouldn’t have been able to get any of it, especially with the macro.