com_jux_timetable&view=classes Filter an views - nothing

Hello Jackie
Filter and display – nothing works as it should.
For example, if I filter another category, nothing appears although classes are entered there. If I select "Tuesday" (Thuesday), for example, nothing appears even though they have been created.
In general, I would like to display all 35 courses on one page. But this only works with 6 courses. If there are more, the display becomes faulty.
So far the components do not work as promised! I urgently need a solution or I maust choose another component.

Thank you for the quick reply.
I already have 12 items from all categories displayed. With this result. Ugly display. Look at the picture
dev.svdjk.de/support/Juxfailure-02.jpg . I can't display anything from another category even if I set the filter to "fitness courses", for example. The search doesn't really work either. I need the filter for all approx. 35 classes.
I have the same problem with the Schedule view. The classes cannot be filtered here either. url dev.svdjk.de/j/index.php/timetable-new-schedule

Sorry, but it seems to be here is something wrong in the component.

Thank you very much! The filter work now, but not really correct.
for example, if I set the filter to "Kinderkurse", only one class appears instead of all three available classes. Only the class on the current page appears.
Please note the screenshot dev.svdjk.de/support/Juxfailure-04.jpg .

In the grid view, the last 6 classes sometimes (sporadically) appear smaller and scattered somewhere on the page. What is happening?
Please note the screenshot dev.svdjk.de/support/Juxfailure-03.jpg

please not the url move to /index.php/kurse/kursprogramm