rl_gallery url no longer working?

So, I used to have no problem using rl_gallery links, but, when wordpress updated, and the swipebox wasn’t working, I changed it over to prettyPhoto, and since then, lots of my rl_gallery links have now broken and show this:

Even if I try to make a new gallery, this problem persists, so I’m not sure what’s causing it?
I love this plugin and it’s helped me a lot, since my sites host comics and having the swipebox is wonderful for stuff like that, but right now, without gallery links working, it’s just not working as probably as I’d like it to.

Any help would be much appreciated! Thanks!