Feed blank in Chrome on WPEngine

Hi,

I can see from the forum that a number of people have had the same issue that the feed on chrome is blank due to the error:

Unsafe attempt to load URL https://cdn.lkmco.org/wp-content/plugins/seriously-simple-podcasting/templates/feed-stylesheet.xsl from frame with URL https://www.lkmco.org/feed/podcast/. Domains, protocols and ports must match.

This is hosted on WPEngine, and you have suggested in other to contact the host. I have spent some time working with the host to try and resolve, but they have redirected us back to you. Here was there response.

So on our end I can assure that all the required rules have been added that typically resolve this issue, but unfortunately that page is still not loading.

Would it be possible to check with the developers of this plugin once more to see if there is a configuration change needed?

Is there anything that you can do to resolve?

Thanks
JR