Huawei Solar Sensors not available

Hello together,
I am new in Home Assistant and struggle to setup all the Huawei Solar Sensors. I installed the Huawei Solar integration with HACS and this is working so far. I updated Firmware Versions on the Dongle and Inverter to the right one. So I see all the Standard Entities and they are showing some realistic data.
To create some useful Dashboards I wanted to use the helpers created by Joerg Heinemann from here: Dashboards · wlcrs/huawei_solar Wiki · GitHub
For this I added all the mentioned packages to the configuration.yaml:
homeassistant:
packages:
huawei_solar_yield: !include packages/huawei-solar-yield-package.yaml
huawei_solar_battery_card: !include packages/huawei-solar-battery-card-package.yaml
huawei_solar_battery_correction: !include packages/huawei-solar-battery-correction-package.yaml
huawei_solar_diagnostic: !include packages/huawei-solar-diagnostic-package.yaml
huawei_solar_power_flow_card: !include packages/huawei-solar-power-flow-card-package.yaml
huawei_solar_energy_flow_card: !include packages/huawei-solar-energy-flow-card-package.yaml
solcast_solar: !include packages/solcast-solar-package.yaml

I can find all these sensors now, but they have the state “not available”. What am I doing wrong?
For example the sensor.house_consumption_power uses the sensor.inverter_active_power for calculation. But the sensor.inverter_active_power is not available in my configuration. Is there missing something essential or what could be wrong?