@volkan64,
I didn't change a bit on your site. Not created any schedule, not added any code.
and check this recording:
http://somup.com/cYfFFtilfp
The schedule is loading in the courses.
refer:
https://prnt.sc/s1wwsh
Sometimes it takes time to load, what you can do is navigate through the buttons, switch to week view and then month view to check if the schedules are loaded or not. The react big calendar which we used in this addon internally hits a lot of calls to fetch everything. That's why it takes a few seconds to load the schedules
Breaking the slot yes I can see that even the slots option correctly selected but it is not working(I need 2 days to fix this)
For the pricing, let me check what is wrong here according to this video of yours: https://screencast-o-matic.com/watch/cYfbDlzxgh