WP Aggregator Lightbox

Using the WP Aggregator plugin with the setting:
Open links behaviour: Lightbox
The links just open a window that says “refused to connect”
Any suggestions?
Everything is updated and tested in different browsers, the link works perfectly, it doesn’t work if I try to use the Lightbox setting to open it up in a popup window like this.
https://drive.google.com/open?id=1ExEQQE6jqEi3auxz0zy7B1YxSa6pEI8u