I have install fluxgui to lower eye strain by lowering blue light. while running fluxgui it says-
ImportError: cannot import name AppIndicator3, introspection typelib not found. I am using kali linux.
I think you need to use the below code:
sudo apt update; sudo apt-get install gir1.2-appindicator3-0.1
now it is saying - Package ‘gir1.2-appindicator3-0.1’ has no installation candidate
Just try sudo apt update
sudo apt update