when you try to use on localhost, you get permissions folders error with it and you can't display the feeds
There may be a problem with your cache permissions:
Main cache: rwxrwxrwx
Input cache: rwxrwxrwx
Output cache: rwxrwxrwx
Please set your cache permissions to rwxr-xr-x.
Your Syndicate Press cache directory is located here: C:\xampp\htdocs\wordpress\wp-content\plugins\syndicate-press/cache