Difficulties with Home Assistant / Flux / ESP

Hello Community,

I’m trying to get started with HA for a while now.
First Milestone was the implementation of a LED which sets its color temparature according to daytime.
I managed to program my ESP32 and include it into HA. The Button to switch the LED on/off and set brightness/color is shown in HA panel.
So far so good…
Now I tried to include a flux switch into the configuration.yaml:

switch:
 - platform: flux
   lights:
    - light.led_mix
   name: fluxer
   start_time: '7:00'
   stop_time: '23:00'
   start_colortemp: 4000
   sunset_colortemp: 3000
   stop_colortemp: 2200
   mode: xy
   transition: 30
   interval: 60

So here my question: Who is up for the task to help me?

You’re going to have to tell us what you actually need help with?

Sorry. The flux switch isn’t working at all. The light color doesn’t set according to daytime. Do I have to activate it somewhere?

Any errors in the logs?

Well I got this message:

Protokolldetails ( ERROR )
Sun Dec 06 2020 10:50:19 GMT+0100 (Mitteleuropäische Normalzeit)
http://hassio.local:8123/logbook:0:0 ResizeObserver loop limit exceeded

Not sure if this has anything to do with the problem.
Further I have checked the History. The switch “fluxer” appears there, but is constantly turned off.