Update is out and title fixed!
But didn't change anything on the broken courses, I just now got the HTTP-Error:
But if I create a account myself and click on trial, everything works fine.
I don't know why the API should any be broken on this course?
Maybe there is an error in parsing the course id?
It's an error with the cache server on udemy's end. Trying to see if i can find a work around.