Q: "Can't parse your feed" error

You have 'Music' as a category and 'Podcasting' as a sub-category: you must stick to the categories listed here:

https://help.apple.com/itc/podcasts_connect/#/itc9267a2f12

'Music' has no sub-category and there is no 'Podcasting' category or sub-category.

Your 'pubDate' tags are incorrectly formed. The top one reads

<pubDate>September 1, 2016</pubDate>

The month must be in short form, there must be a leading zero on the date, and there must be a time and a time zone, e.g.

<pubDate>Sep 01, 2016 13:00:00 GMT</pubDate>

see http://www.feedvalidator.org/docs/error/InvalidRFC2822Date.html

Your 'enclosure' tags are lacking the "length" attribute which should contain the file size in bytes - this probably doesn't matter with iTunes but its absence technically invalidates the feed.

The 'itunes:summary' tag in your top episode contains a CDATA tag:

<itunes:summary><![CDATA[This week we talk about <a href="https://itunes/apple.com/us/book/antique-trader-salt-pepper/id429691295?mt=11">salt and pepper shakers</a>, comparing and contrasting pour rates, construction materials, and overall aesthetics. Come and join the party!]] ></itunes:summary>

FeedValidator is complaining that this is unclosed - I can't see why unless the final ! is upsetting things; but in any case there's no point at all in doing this because iTunes won't render HTML, it will display the code, so the link you've provided won't work but will just look messy. You should remove the CDATA tag and stick to plain text without any HTML.

And I see that all you did was copy the sample feed - I had assumed you used it as a basis for your own feed. Even so, it doesn't work - it turns up empty in Firefox.. I don't know why they are encouraging CDATA, it's not a good idea. And the URL in that tag is nonsensical anyway. The validator they recommend throws up exactly the same error as FeedValidator (probably uses the same algorithm).

If you want a sample feed to use as the basis of your own (not just copy) there is one on my site:

http://rfwilmut.net/notes/podcast.html#sample