Thank you for bringing this to my attention. It's been a while since I've had the time to explore the site. From what I can tell, the new beta they've pushed out has indeed broken the add-on. It does still work fine on the non-beta site but I'm not one to tell you that going back is a viable solution.

I plan to work on supporting the beta version as soon as I can, just know that it may not come for a few weeks due to work and school. (It's that time of semester where professors make all of their projects due.) If I have time sooner then it will get done sooner. Anyway, thanks for using the add-on up until now.