Rikaikun and other dictionaries stopped working

For some reason Rikai-kun, as well as Liuchan, which are pop-up dictionaries, stopped working on all LR content. EXCEPT, it will still correctly work on the side window.
This is really annoying as I found the included dictionaries to be quite poor, and this came without warning.

Additionally, most of my “hide subtitles” options are now marked undefined.