No feed found

Hi,

I use RSS Includes to display posts from a few wordpress sites on my homepage. I’m trying to add a new one but it’s not wording.

The feed is https://essexmums.org/active/index.php/feed/ – using that link shows there is info there, and the link validates okay but when I put it into the feed widget I just get a message saying the feed couldn’t be found at that URL. Is there something I’m missing?

(I appreciate this could be a problem that needs to be answered by the people at RSS Includes but I haven’t received a reply from them and thought someone here might have an idea!)