I confirm that the article can be saved now. (Browser restart was needed after updating the translator.) However, I did get an error on the first attempt to save. It worked on subsequent attempts.
You shouldn't have needed to restart Firefox, but you would need to reload the page.
I also got intermittent errors in testing, but I think they had to with how I canceled the PDF download that the embedded PDF kept triggering, and there's not much we can do to prevent that.
It should start working again. If this works for you, please post here so that I can submit this change to be pushed to all users.
I also got intermittent errors in testing, but I think they had to with how I canceled the PDF download that the embedded PDF kept triggering, and there's not much we can do to prevent that.