yes I have already set the setting to OpenStreetMap but WITHOUT success.
I have looked at the ICS file in the editor but found nothing unusual.
Here is an excerpt (single appointment):
DESCRIPTION:Traffic jam Penna\n Afterwards Aalpokal
SUMMARY:Family fishing day of the ASV Rochlitz e.V.
Furthermore I have created a test calendar on my Mac, created an appointment with address in it and included it in the ISC-Calendar.
Here, too, Google Maps is linked (despite Apple).