this issue is reappearing under Ubuntu 20.04 kernel is 5.4.0-26 if that matters.

CHIRP depends on python2 and several other python2 related packages. These have been removed from Ubuntu 20.04

As CHIRP is migrated to python3, you can try a flatpak that is in early development in the meantime.

From https://www.flatpak.org/setup/Ubuntu/

sudo apt install flatpak

If that doesnt work then try:

sudo add-apt-repository ppa:alexlarsson/flatpak
sudo apt update
sudo apt install flatpak

Now that flatpak is installed, you'll need to set up the gnome plugin and the default repository

sudo apt install gnome-software-plugin-flatpak
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

Now that flatpak is all set up try out this flatpak by Richard Shaw

curl -LO https://hobbes1069.fedorapeople.org/chirp-20200430.flatpak
flatpak uninstall chirp
flatpak install chirp-20200430.flatpak

If you already had flatpak installed, you'll immediately notice a CHIRP icon in your programs list.
If you just installed flatpak, log out and log back in to see the new CHIRP icon in your programs list.