Failed to call service climate/set temperature

[markusschultheis]

Failed to call service climate/set_temperature. Cannot put https://smart.vaillant.com/mobile/api/v4/facilities/xxxxxxxxxxxxx/rbr/v1/rooms/0/configuration/quickVeto, status: 400, response: {"errorCode":"INVALID_PARAMS"},payload: {'temperatureSetpoint': 18.0, 'duration': 3}

When I try to set the temperature in the App, this error occurs.

My Setup:

Vaillant Internetmodul sensoNET VR 921,
Vaillant ambiSENSE Raumthermostat VR 51,
Vaillant ambiSENSE Thermostatventil VR 50,
Vaillant sensoAPP (V 3.19.5).