My script needed a verification code today and hit this error for the first time. While writing a simple test script to show the issue and was reminded that it uses cookies; I got curious and found two files in the directory, {foo} and {foo}.session (where {foo} is an appleid email address with punctuation removed). After removing these files I was able to re-authenticate (after satisfying the verification challenge of course).

That didn't work for me, and the same happens for me with the reminders service ... the fmip and contacts services, however, seem to work just fine ...

Any chance one of the contributors can guide us to how we can debug this further?

One thing I found interesting, not sure if related to the above issue, is that the api.requires_2fa and api.requires_2sa both return False while my appleid settings show TWO-FACTOR AUTHENTICATION as "On". Though, why would the contacts service returns info without further 2fa? Note that I use a keyring, but I also tried instantiating PyiCloudService with a password directly, to no avail.

A duplicate of #322. (Also experiencing the same issue.)

Same thing for me.

Having the same issue. Would really love to find a solution here.

Same here

Same issue here

Same here

After comparing the request fired at browser to the payload generated at pyicloud, i found that param dsid is lost and it causes 419 http error.

To fix the problem, you can append the following code to pyicloud/services/calendar.py:L55

        params.update(
            {
                "lang": "en-us",
                "usertz": get_localzone().zone,
                "startDate": from_dt.strftime("%Y-%m-%d"),
                "endDate": to_dt.strftime("%Y-%m-%d"),
                "dsid": self.session.service.data["dsInfo"]["dsid"],  # PATCH HERE!!
            }
        )

Many thanks @zarkin404 - that fixed it for me but needed to be patched on line 83 also.

Thank you very much

The monkeypatch is working for me. If this is generally a working solution, please merge soon.

Happening for me today after monkey patching the suggested. Anyone else seeing this?

I'm sorry fix didn't work for me on Python 3.9.2

File "/home/pi/python/./icloudlogin.py", line 62, in
print(api.calendar.events(from_dt, to_dt))
File "/home/pi/.local/lib/python3.9/site-packages/pyicloud/services/calendar.py", line 64, in events
self.refresh_client(from_dt, to_dt)
File "/home/pi/.local/lib/python3.9/site-packages/pyicloud/services/calendar.py", line 57, in refresh_client
req = self.session.get(self._calendar_refresh_url, params=params)
File "/usr/lib/python3/dist-packages/requests/sessions.py", line 555, in get
return self.request('GET', url, **kwargs)
File "/home/pi/.local/lib/python3.9/site-packages/pyicloud/base.py", line 131, in request
return self.request(method, url, **kwargs)
File "/home/pi/.local/lib/python3.9/site-packages/pyicloud/base.py", line 133, in request
self._raise_error(response.status_code, response.reason)
File "/home/pi/.local/lib/python3.9/site-packages/pyicloud/base.py", line 189, in _raise_error
raise api_error
pyicloud.exceptions.PyiCloudAPIResponseException: Authentication required for Account. (421)

I did the patch, but I'm now getting
pyicloud.exceptions.PyiCloudAPIResponseException: Authentication required for Account. (500)

Which is different as the error code is 500. Still not working, really need a solution.