Hi!
Ok, cool you solve it.
Just to let you know, custom kali is not 2 years old, it uses Gnome for the graphic interface, which is what makes you think is old but is based on offical kali 2020.1.
Also we don’t recommend using it as main OS, actually kali was designed to be used as a virtual machine, and I mean the release by Offensive security.

Greetings!
Diego