HTML extenstions published in L16 not working when published with L17


i'm currently updating some old modules and I have to publish them to our LMS. When I check them in a browser everything is working perfectly, but when I publish it and put it on our LMS HTML extensions and my accordions are not working.

Any ideas what might have gone wrong...? What to change?

And yes...i'm kind of desperate since i need it for yesterday. :)

I have only L17.