If you are reading this article then you know what is chrome remote destop so i am not gonna give any introduction and will go straight to the point.
After following every instruction of how to install chrome remote desktop in the internet you may end up on this page

Instead of this page

This mean chrome is not allowing you to create a new device,the fix for this is to type the following command in terminal
mkdir ~/.config/chrome-remote-desktop
NB: this fix is tested on Ubuntu 20.04 LTS (this might not work for windows or MacOS)