Tado integration failed

I want to integrate the Tado system but it get this error:
Any idea what happended? Thanks a lot

File “/usr/local/lib/python3.12/site-packages/requests/adapters.py”, line 519, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host=‘auth.tado.com’, port=443): Max retries exceeded with url: /oauth/token?client_id=tado-web-app&client_secret=wZaRN7rpjn3FoNyF5IFuxg9uMzYJcvOoQ8QWiIqS3hfk6gLhVlG57j5YNoZL2Rtc&grant_type=password&password=xxxxxxxxxxxx&scope=home.user&username=xxx.xxxx%40outlook.de (Caused by NewConnectionError(‘<urllib3.connection.HTTPSConnection object at 0x7f1283719bb0>: Failed to establish a new connection: [Errno 113] Host is unreachable’))