I am having what I think is a similar issue. I have a website that is wordpress, https://www.defuniakherald.com, that I am trying to syndicate to another site. I get the RSS feed information but when I put it in the syndicate plug-in it says that no feed exists. That is the only site I have ever ran across that does this, every other site works. I was told that this site is on an installation of wordpress that had some sort of permission issue in the past. Any ideas would be appreciated.