I am sorry, this is not directly related to your plugin, but I see in the description and screenshots that the RSS Feeder can post to the Groups Newsfeed.
Well, I don't have any newsfeeds in my groups!!! I checked the Groups plugin settings as well as the Newsfeed plugin settings but didn't find anything. The Groups page customization does not show any Newsfeed widget.
I use Oxwall 1.6.
Do you have any help on that?