Wordpress Content (Sometimes) never loads!

We've been having an issue where random H5P modules display the issue below.

They never seem to load, and only the box around the location where the module should be appears.

I've tried rolling back, the only thing that seems to help is recreating the H5p from scratch. But... many of

our old modules work and it seems that there is no rhyme or reason to the breaks.


I've attached the console as well.