I am trying to add the following URL (https://www.id-cubic.de/feed/podcast/ or https://www.id-cubic.de/feed/podcast) as a new podcast, but I get the following error message "https://www.id-cubic.de/feed/podcast: Could not parse feed: :1.0: not well-formed (invalid token)". For other podcast readers this feed works fine and I can retrieve the embedded audio podcasts without any problems.