The feed wont display

Apparently Roku Co is no longer maintaining the rokudev.roku.com hostname.
The example you linked has this categories feed, https://devtools.web.roku.com/videoplayer/xml/categories.xml[/url:17n9xnch]
why are you using that old one??

I had changed thed the feed 

<?xml version="1.0" encoding="UTF-8" standalone="true"?>
<categories>
<!-- banner_ad: optional element which displays an at the top level category screen -->
 <category title="Bonanza" description="The widowed patriarch Ben Cartwright had three sons, each by a different wife: the oldest was the urbane architect Adam Cartwright, who built the ranch house. The second was the warm and lovable giant Eric, better known by his nickname Hoss. And the youngest was the hotheaded and impetuous Joseph or Little Joe. They all lived and worked on The Ponderosa. Nearby Virginia City helped populate the episodes with guest starring characters from all over America." sd_img="http://griffingatv.website/images/mm_icon_focus_sd.png" hd_img="http://griffingatv.website/images/mm_icon_focus_sd.png">
  <categoryLeaf title="" description="" feed="http://griffingatv.website/xml/bonanza.xml"/>
  </category>
</categories>
This code keeps showing up:

Error: status code was: -51

The list of error codes is here:
https://sdkdocs.roku.com/display/sdkdoc/roUrlEvent

-51
CURLE_PEER_FAILED_VERIFICATION
peer's certificate or fingerprint wasn't verified

Try loading it with http.  And your png files don't exist or don't have the required permissions.

I still cant get it to display

Trying to load http://griffingatv.website/images/mm_icon_focus_sd.png in a browser fails.
If you can't load a url in a browser with the url you are telling Roku to use, then it's not going to load on Roku either.

That means I shouldn't load it off my domain?

All your links are broken on your domain -
http://griffingatv.website/

The only link that actually does anything is at the bottom of the page to install your roku channel.
Your website is screwed up, so your roku channel can't use anything there.  Fix the site and most likely your channel will start working again.  Ask HostGator for help if you need it.

I changed it but there's a new error: Error: status code was: 404

404 is file not found.