Are you not able to open settings in the kali Linux or ubuntu? this is a common error that often occurs after upgrading the Linux using the command “apt-get upgrade” in which the kali Linux settings interface fails to load.
here is a quick fix :
step 1. open your terminal window
step 2. type
sudo apt-get upgrade gnome-control-center
types “yes” if it asks you anywhere
and after completing the process your settings should be open.
let me know in the comments if it worked or not.