webcal with ics.php

first of all, I really love em client. I use it to manage my calendars on my RaspberryPi wit Baikal. The import of .ics files works fine. Now I’d like to import this calendar:
I always get an error message when I use .ics import. Is there an option to do it right?
Thanks for your help,

Hello Constantin, eM Client unfortunately does not support calendar subscription, it is not possible to import a .php file using .ics import, in order to import a calendar you’d have to download a .ics file.