I've tried to install feedreader to try its Feedly integration, but it does not seem to work, at least I could not find how to do it.

When I try to run it, an empty window appears, where you supposedly have to connect to an account, but I can't find out how.

It seem to be a Gnome app and I'm running on Plasma Desktop, but so far I have used other Gnome apps without any problem, I don't understand why this one seems not to work.

Any clues?