Calendar Sync - Due Date

[Petros]

Dear community,

i use the calendar power up and added the calendar via URL with my google calendar.
This worked great until this week.
If I create a new card and add a due date, the card doesn't get synced with my google calendar. I don't know why it doesn't work anymore.
At google I deleted the calendar and added it again. Then I also created a new trello calendar link, and it worked for one day. Then it stopped again.

Do you know a solution?
Thank you very much!
Petros