Can't access internet in kali virtualbox

It is not broken, it is a feature. Kali comes with networking disabled by default to prevent denouncing your own presence through an unconscionable DHCP request.

You will have to start your connection with the traditional Linux means, something like

 sudo ifconfig eth0 up
 sudo dhclient eth0

or some such thing, depending on how you see fit.

The solution was this

vi /etc/NetworkManager/NetworkManager.conf

Change false to true

And then

service network-manager restart