All you have to do is to turn off https on site, so as to let the feed run at reddit session and have the ability then to configure it filling the subreddit of your choice. Another way is to enable “Allow insecure content” at your internet browser, several of them has now make available these option.
At the below image example after testing several well known browsers, firefox done it quick but tor browser remains to be the best fit showing the feed without any configuration.
*These project site was forked and css, code upgraded by mixmedia ATH.