An error occurred while retrieving auth cookies

[hanumavivekm]

We have an application that will connecting with sharepoint website and check if a certain file is available. For this we are using Office365-REST-Python-Client==2.4.0 package. Now this works most of the times but fails to connect to SharePoint sometimes. We receive this error in the logs. I would like to understand what the reason behind this failure. The stacktrace bils down to the following file and function.

\Python311\Lib\site-packages\office365\runtime\auth\providers\saml_token_provider.py

def _get_authentication_cookie(self, security_token, federated=False):
        """Retrieve auth cookie from STS

        :type federated: bool
        :type security_token: str
        """
        logger = self.logger(self._get_authentication_cookie.__name__)

        session = requests.session()
        logger.debug_secrets("session: %s\nsession.post(%s, data=%s)", session, self._sts_profile.signin_page_url,
                             security_token)
        if not federated or self._browser_mode:
            headers = {'Content-Type': 'application/x-www-form-urlencoded'}
            if self._browser_mode:
                headers['User-Agent'] = 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)'
            session.post(self._sts_profile.signin_page_url, data=security_token, headers=headers)
        else:
            idcrl_endpoint = "https://{}/_vti_bin/idcrl.svc/".format(self._sts_profile.tenant)
            session.get(idcrl_endpoint,
                        headers={
                            'User-Agent': 'Office365 Python Client',
                            'X-IDCRL_ACCEPTED': 't',
                            'Authorization': 'BPOSIDCRL {0}'.format(security_token)
                        })
        logger.debug_secrets("session.cookies: %s", session.cookies)
        cookies = requests.utils.dict_from_cookiejar(session.cookies)
        logger.debug_secrets("cookies: %s", cookies)
        if not is_valid_auth_cookies(cookies):
            self.error = "An error occurred while retrieving auth cookies from {0}".format(
                self._sts_profile.signin_page_url)
            logger.error(self.error)
            raise ValueError(self.error)
        return cookies