Stories are not fetched properly. I am subscribed to a news site, which is updated regularly, but have not received any items from it for the last 8 hours.
All sites should definitely be working fine now. Got the NewsBlur URL of the site? That will have the feed id that I need to check it.
You can also kickstart this process by right-clicking on the feed and Insta-fetching the stories. That will force it to re-evaluate statistics and re-schedule a fetch.