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Creating Rss feed should not return errors.
Can you provide me more information on the error message like a screenshot or is it a pop-up error or the error is containing a stack trace? Also can you give me additional information on the server infrastructure where the site is deployed.
Try reproducing the error when firebug is turned on and Net tab is the active tab. This will show which request has been blocked.
To better determine the cause of the problem try running the project on localhost to see if you will get the error. If no error appears then there should be something in the server configuration that is causing this.
As a possible solution try deleting your rss feeds from the database (do this on a backed up copy of your project when making changes directly to the database).
First check if you have anything filled in those tables. If they are empty you don`t need to clear them.
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