Podcasts - Adding "Sing The Hours" Podcast

Hello,

I'm usually pretty good at figuring out how to add a podcast to the Podcasts app in Logitech Media Server (LMS), but this time I'm stumped.

Here is the link: https://loh-12220-matins.castos.com/feed/

If I open this in a browser, I see the feed but I cannot get the feed into Podcasts.

Thanks,

David