Everything fine but not Events showing

I went through all the steps of the manual and the connection ist working. Unfortunately, no event is shown. I use the theme ‘Kidsplanet’ but have the same result with ‘Twenty Fifteen’.

Here is the testing page with the Eventbrite template:
http://babytheater-berlin.de/?page_id=1080

Here is a second test page with the Eventbrite Widgets and it is working:
http://babytheater-berlin.de/?page_id=1083

Could you please help?