Update 2022.02.07, verified fix:
I was able to circumvent the problem by adding the podcast via an OPML file. To do this:
- Go to an OPML file generator, such as https://opml-gen.ovh/
- Generate an OPML file that includes the problematic RSS feed. In my case, this was Knowledge Fight
- In Plex, click ‘Add Podcast by URL’
- Choose ‘Import podcasts from an OPML file instead’
- Choose the OPML file you generated
- Click ‘Continue’
You should see the problematic podcast feed included in your podcasts.
Good luck.
Original post, no longer working:
I experienced the same issue with Knowledge Fight – it disappeared, and I was unable to add it back. I checked their RSS feed against a few validators, and found issues with the XML.
I was able to re-add Knowledge Fight by running their feed through an RSS scrubber and subscribing to the scrubbed feed. This URL points to the scrubbed feed:
http://rssscrubber.azurewebsites.net/api/rss?source=https%3A%2F%2Fknowledgefight.libsyn.com%2Frss
