Yes and no, I reached out to the creator of the component and he said if I turn off error reporting it would get rid of the error on the rss feed, however, the site is still producing the error.
He said that "The true fix for this would be me adding an isset($item->mime) check to that line in addition to the other check that is in place. " He goes on to say that it has something to do with the database not updating correctly, but I have no experience with mysql and do not know how to correct the problem completly.
He goes on to give a way to check the databse, I will list it here so if you see this type of question again you may direct the, here.
At
github.com/mbabker/Podcast-Manager/blob/...ates/mysql/2.0.0.sql, all of the database changes to go to 2.0.0 from a 1.x release are listed, so you can check your database to ensure that it is up-to-date, and if not, run those queries to do so (remember to replace the -- prefix with your site's prefix).