Is there any way to get RSS Feeds working on here?

My RSS readers say access denied, even though per discourse documentation, the feed exists, and can be downloaded from browser, logged or not by entering for example: https://forum.codefloe.com/c/announcements/11.rss. Could it be an User-Agent issue?

It appears, forcing User-Agent header to not be empty, for example Rss Guard fixed this issue.