Hi Bas
Thanks for the great work. I have used this add on for 6 months and all works perfectly for my various brand smart lights.
I have automation to enable sleep mode at 11:00 pm every day, however, it stops working in recent month. I have troubleshot around and I realise I cannot even put into sleep mode manually.

I'm not sure why this caused, please see the screenshot of my configuration.

Also, I found an error in the log attached.

Many many thanks