Hello @kostka,
At first please make sure you have set your front page display to static page by going to Admin Panel > Appearance > Customize > A static page.
Then you also have to make sure that you have selected the categories to display in the Event and News section .
Screen Shot :
https://image.prntscr.com/image/r0VCqeEtQnqLrI2PmyyH3g.png
Hope this helps .
Kindly let us know if the above steps does not solve your issue with your site URL.
Best Regards!!