Today, I found three of my news sites were not showing feeds. When I click on them it opens a window saying “fix a misbehaving site”. I has been following the instructions of that window, but still not working.
I have the same problem : 5 sites went “dark” this week-end and I tested the rss feed of two of them and it’s working in Safari (flux feed fonctionnalty… way worse than Newsblur) !
So you need to find the correct RSS feed. Something broke in feedsportal.com, so I recommend going to the website and grabbing the new RSS feed. I’ve done it manually for a few of the sites above.