the log have quite some warnings that could explain the issue
"gsd-color[3547]: could not find device: property match 'XRANDR_name'='eDP-1' 
does not exist"

could it be that you have a buggy monitor configuration? Does it make a
difference if you move ~/.config/monitors.xml somewhere else and restart
your session?

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https://bugs.launchpad.net/bugs/1730072

Title:
  Gnome Night Light doesn't work

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