UNSOLVED MMM-GoogleBirthdayProvider

[Sebi76]

The Modul MMM-GoogleBirthdayProvider dont work. It comes no issue at the console…Everything starts normally and without errors

At the Screen is only the Message : No Dates

When I enter the calendar URL into the browser.
http://localhost:8080/mmm-googlebirthdayprovider

Then I get my .ics.
So the connection seems to fit perfectly. But where is the Problem now?