iTunes feed does not validate

Thomas, we have another problem. I set up SermonCast, but the feed does not validate with feedvalidator and validator.w3.org/feed . I get the following errors when I submit the link to our sermon page,
westsidehillsboro.org/sunday-morning/sunday-sermons/sermons

This feed does not validate.
line 23, column 1: href must be a full URL: westsidehillsboro.org/images/stories/Banners/ituneslogo.jpg
<itunes:image href=" westsidehillsboro.org/images/stories/Banners/it ...

line 39, column 2: url must be a full URL: westsidehillsboro.org/components/com_ser...18_09_23_be_real.mp3
<enclosure url=" westsidehillsboro.org/components/com_sermonspeaker ...

That validator seems to be unable to recognise HTTPS URLs as valid URLs.
You can ignore that error. The URLs are fine.

The problem is I am getting an "Unable to Parse - Failed Validation" error when I try to submit the URL in iTunes Connect. I am using westsidehillsboro.org/sunday-morning/sunday-sermons/sermons . I also tried westsidehillsboro.org/sermons/sermons/ and it does not validate.

I'm not on a good internet line at the moment. So can't test much myself.
Try with podba.se/validate/ and see what this one tells you.
Also make sure you actually submt the URL of an RSS feed and not the sermon webpage.

I am not sure how to identify the URL of the RSS feed. I see this in the page source of the sermons page :
<link href="/sunday-morning/sunday-sermons/feed?format=raw&amp;catid=59" rel="alternate" type="application/rss+xml" title="RSS 2.0" />
What would be the feed? Our domain is westsidehillsboro.org

westsidehillsboro.org/sunday-morning/sunday-sermons/feed?format=raw&catid=59 would be the feed for that specific page. It will list the sermons of that category only.
You can also create a menuitem for the feed.
Or if you publish the SermonCast module, you can check the link it shows there.