Ronald;
Edit your
“/etc/apt/sources.list.d/dansmith-ubuntu-chirp-snapsots-focal.list” and
point it to “xenial”
>> deb http://ppa.launchpad.net/dansmith/chirp-snapshots/ubuntu xenial
main
This isn't anything Ubuntu or Debian based, it uses the platform defined in the flatpak configuration file, in this case:
"app-id": "com.danplanet.chirp",
"runtime": "org.gnome.Platform",
"runtime-version": "3.32",
"sdk": "org.gnome.Sdk",
Which worked previously although this platform/sdk is depreciated for the same reasons chirp was removed from some distros. Python 2 EOL.