Khan Academy add-on not working on LE

I can't start the Khan Academy add-on. I posted over at the Kodi fourm and after some troubleshooting it seems like my issue is related to LE (since it is working on other platforms).
Thread at Kodi forum: Khan Academy add-on not working
Debug log (same as posted in the thread above): hCMh

Can someone verify if the Khan Academy add-on is working in LE on any platform?

Quote from DaVu

It starts fine for me, but it doesn't load anything. But, tbh, I never used it before. Not sure, if that is a LE problem as it doesn't load anything on my LE installation as well as on my Ubuntu installation. The addon doesn't show any content on each installation

OK, thanks for testing. What platform do you run LE on?
[hr]

Quote from awiouy

The best would be to contact the addon maintainer, if possible

Yes, but jbel's last visit at Kodi the foum is 2014-05-21 so it looks like the addon is abandonware.

Anyway, as far as I can tell it is just a front end for youtube and you can watch the videos there. I'm not going to spend more time on this now.

Thanks!