Innogy: Cannot connect to innogy SmartHome service. Please set auth-code!

Hello together,
I am trying to build up a new Openhab SmartHome system for my home, but I am struggling with the innogy binding. I have the SHC Ver. 1 and I am using Openhab 2.5.9.

After typing the Auth code into the binding I get the error:

OFFLINE - CONFIGURATION_ERROR

Cannot connect to innogy SmartHome service. Please set auth-code!

Has anyone a hint for me to get it working.
Thanks!!