Innogy GenerationMeter Thing cannot be added

I cannot add a thing for the GenerationMeter to openhab 3.
The Smart Home Controller is configured correctly and only. All other devices are working.

  • manually added Thing
  • select binding: innogy
  • select Generation Meter
  • use the generated Unique ID as the ID for the Thing configuration
  • select the Bridge

I get the following in the log:
2021-04-25 10:27:31.703 [WARN ] [internal.handler.InnogyDeviceHandler] - initializeProperties: The device with id 872c6cc176 isn’t found
2021-04-25 10:27:31.706 [INFO ] [ab.event.ThingStatusInfoChangedEvent] - Thing ‘innogysmarthome:GenerationMeter:innogySHC:872c6cc176’ changed from INITIALIZING to OFFLINE (GONE): Device not found in innogy config. Was it removed?

Is it still needed to have a innogy config file in OH3?
Is the generated Unique ID the correct value for the ID in the configuration of the Thing?

Any help is appreciated.

[System is running on PI4 with openhab version 3.0.2 Release Build]