So I tried this plugin for the first time yesterday. I installed it and everything seemed to be working fine. Then today, I realized that google feedburner didn't send out the email digest of our post published today. So after checking a few things I noticed that the feeds couldn't be accessed and I got error 500- internal server error. Got in touch with the hosting company to see if they had made some changes maybe the permission on the servers were changed. We tried a few things but nothing worked. Since this is the first time this is happening, I thought I would deactivate your plugin (the only change to the website since this error started). As soon as I deactivated your plugin, the issue was resolved.
As-is I can't use your plugin. If this gets resolved, I will test it again.
Thank you