@webboy10169 thanks for your patience.
This is interesting, I also have Jetpack installed on my main podcast, which uses SSP, and I don’t get the same error. I also notice that your feed has the following error in the Chrome console. Resource interpreted as Stylesheet but transferred with MIME type application/xml: “https://8bitbros.us/wp-content/plugins/seriously-simple-podcasting/templates/feed-stylesheet.xsl”.
Are you able to disable all other plugins on the staging site, except Seriously Simple Podcasting and Jetpack, and switch to the default 2019 theme, and see what happens. I have a feeling this is another plugin or theme conflict.
The other option could be some Jetpack setting I don’t have enabled, but if this is the case, switching the site to only having the two plugins and the default theme enabled, will allow us to dig into Jetpack from there.