Extra Spaces

there are extra spaces at the begining of the XML statement. and my RSS feed wont validate.
http://www.covenantassembly.com/?feed=podcast
http://feedvalidator.org/check.cgi?url=http%3A%2F%2Fwww.covenantassembly.com%2F%3Ffeed%3Dpodcast
iTunes has rejected the feed as well.

Looking at other posted i understand it may have something to do with my theme. but Where to even look? I’m using the Sixteen theme from inkhive.

Thanks for the help in advance!

https://ww.wp.xz.cn/plugins/seriously-simple-podcasting/