The bug is in 'Create new course' webpage.
I think it is ajax or javascript bug:
I can't click on profile: http://prntscr.com/ap71y0
File picker doesn't work: http://prntscr.com/ap7257
I can't open out: http://prntscr.com/ap72jc

I tried to change language, and when I changed website in English language, everything works fine. (http://prntscr.com/ap731j)