[Userscript] WaniKani Workload Graph

So it looks like jQuery is missing. I searched a bit and found:

so it seems that the script should add/use:

wkof.include('Jquery');
wkof.ready('Jquery').then(do_something);

I change the script a bit (moved call to add_css(); to then() block and the rest DOM modifications) and while it removed the error it didn’t make the graph visible.

All in all - is this script working for anyone?