This completely worked for me! (But I excluded running the ‘init 3’ command).
I got this error right after installing Kali Linux, updating and upgrading all packages, and rebooting.
I believe it might have been the WiFi driver that caused this issue. I enabled my wlan connection for my Internet connection when setting up my Kali installation. Once it was fully installed, I logged into GNOME desktop and I plugged in my Ethernet cable to my laptop and updated the packages that way. When I tried to disable the WiFi connection or change any of the WiFi settings and pressed apply, it wouldn’t save and would immediately go back to what it previously was when I changed a tab in the settings menu. So, I rebooted to try and fix that but it resulted in the same error op was having.