For the last day or two https://www.reddit.com/r/todayilearned doesn’t refresh. I can see the feed itself being properly updated when I load it in the browser. Not in NewsBlur though. And when I select the feed and chose to show “all stories”, the blue bar blinks like crazy and nothing shows up.
The actual RSS feed address is Today I Learned (TIL)
Not much help here. I deleted the feed and re-added, that solved the problem.
Most of the time these automatically fix themselves when they stop fetching for whatever edge case reason. My recommendation would have been to go to the Statistics dialog for the feed to see why. You still can and at the bottom it will show you when it fetched and what went wrong.