Bug Title

Error integration setup

Bug Description

After a new install of the Divera Integration my Access Key doesn`t work anymore.
(Dieser Accesskey wird nicht unterstüzt. Bitte verwende den Accesskey eines Benutzers.)

Home Assistant Version

2025.12

Divera Integration Version

1.3.5

Divera Version

Pro

Logs or Error Messages

Logger: custom_components.divera
Quelle: custom_components/divera/divera.py:788
Integration: Divera 24/7 (Dokumentation, Probleme)
Erstmals aufgetreten: 16:11:44 (1 Vorkommnis)
Zuletzt protokolliert: 16:11:44

Unsupported Usergroup ID: 3

Additional Information

We're using the Pro Version, I'm an admin in the "Stammeinheit" and in the other "Untereinheiten". Also I'm part of another Unit without any advanced rights using the "Doppelmitgliedschaft" functionality. The Integration has worked before with this setup but stopped after the reinstall.