Nothing showing on favourite list

Im having the same problems as a lot of other people here. This was working fine for me up until a couple of weeks ago, now nothing gets added to the favorite list when I add a post. Im using custom post types, but that isnt the issue as it was working fine previously.

I think this may have broken after a wordpress update – any ideas? Im on 3.8.2

https://www.ads-software.com/plugins/wp-favorite-posts/