API Graph Python: Get Calendar Events - ODataError

Hello,

for an application I would like to extract the calendar events for the upcoming 10 days of specific calendars within my company.

Therefore I followed the Tutorial "Build Python app with Microsoft Graph and app-only authentication.

https://learn.microsoft.com/de-de/graph/tutorials/python-app-only?tabs=aad

The example code is working - I get an access token and also the users are listed.

However - when I integrate my own API call I get the error: 

msgraph.generated.models.o_data_errors.o_data_error.ODataError

Our Admin provided the Application Permissions: Calendars.Read, Calendars.ReadBasic.All

To extract the Events from a specific calender I use an adapted version of the last example of the following page: https://learn.microsoft.com/en-us/graph/sdks/create-requests?tabs=Python 

The code (which causes the error in line 12) in the graph.py is the following:

from msgraph.generated.users.item.calendar.calendar_view.calendar_view_request_builder import CalendarViewRequestBuilder
import datetime as dt
    async def get_calendar_events(self):
        start_date = dt.date.today()
        end_date = dt.date.today() + dt.timedelta(days=1)
        query_params = CalendarViewRequestBuilder.CalendarViewRequestBuilderGetQueryParameters(
            start_date_time=str(start_date),
            end_date_time=str(end_date),
        )
        request_config = CalendarViewRequestBuilder.CalendarViewRequestBuilderGetRequestConfiguration(
            query_parameters=query_params,
        )
        
        calendar = await self.app_client.users_by_id('email address removed for privacy reasons').calendar_view.get(request_configuration=request_config)
        print(calendar)
        return calendar

The code in the main.py is the following:

async def list_calendar_events(graph: Graph):
    calendar = await graph.get_calendar_events()
    print(calendar)
    for event in calendar.value:
        print("Event ID: ", event.id)
        print("Start: ", event.start)
    return

What is the error and how can I correct it?

Thank you!