Trying to make an rss feed for my son's podcasts. Itunes says it can't parse this https://gist.github.com/jgmac1106/f4fce3d21549f78fc184f69d998b8957 a

Trying to make an rss feed for my son's podcasts. Itunes says it can't parse this https://gist.github.com/jgmac1106/f4fce3d21549f78fc184f69d998b8957 anyone know what I did wrong?