Although GNOME Shell integration extension is running, native host connector is not detected. Refer documentation for instructions about installing connector. code example

Example: Although GNOME Shell integration extension is running, native host connector is not detected.

#  Ubuntu 20.04
sudo apt-get install libproxy1-plugin-networkmanager gnome-shell-extension-system-monitor

# Ubuntu 19.10
sudo apt-get install gir1.2-nm-1.0