Podcasts connect "Can't parse your feed"

Question

I'm trying to submit a podcast to Podcasts Connect and I get the error

Can’t parse your feed.

With a status of

Failed Validation

This is my feed. I've used multiple rss validators (Here's the list)

• Podba.se
• Castfeed validator
• W3C rss validator

Among others. Every validator says that my rss is good or has nothing bigger than a few warnings, but whenever the Apple validator at Podcasts Connect gives this error I mentioned saying it cant parse the feed, but not any further description. Any Idea of what could my problem be or where is my mistake?

UPDATE: Just as a test I tried to submit it to Spotify and it didn't worked.

Answer 1

Ok so after a lot of trial and error I found what was causing the trouble.

My feed had this line at the very begining:

standalone="yes"

Inside the <?xml ?> declaration.
Removing that from the feed fixed it for both Apple Podcasts and Spotify.