I just tried to fetch TDARB.ORG's RSS-feed[0] with RSS Guard[1] app (via development "nowebengine" AppImage build), but for curious reasons it shown empty (even XML-file include some posts data).

UPD: It's working now, after switching RSS-feed "Type" to "RSS 2.0/2.1" (by default RSS Guard set "ATOM 1.0")

[0] https://tdarb.org/feeds/posts.xml

[1] https://github.com/martinrotter/rssguard/releases/tag/devbui...