Can't add a podcast from RSS

Hello, I am trying to add a podcast via RSS into Antennapod, but when I copy the url it returns with an IO error, hostname not recognized. I don’t know much about how RSS works but could someone tell me what I am doing wrong, or if adding this podcast is possible?

I am using GrapheneOS on a Pixel 7 pro.

This is a screenshot of the error:

This is the RSS I am trying to add:

https://cfmu.mcmaster.ca/shows/70/podcast

Any help is appreciated, thanks!

The server behind that URL is misconfigured. Maybe the following link works. But I would still contact the creator and ask them to fix their server (if they publish that feed address officially)

https://cfmu.ca/shows/70/podcast

Yes that worked perfect! Thanks for your help, I will contact them and let them know.

Thanks again.