Enable polkit debug logs

• Create a polkit rule at /etc/polkit-1/rules.d/00-log-access.rules

polkit.addRule(function(action, subject) {
    polkit.log("action=" + action);
    polkit.log("subject=" + subject);
});

• Enable logging in systemd service by removing --no-debug flag in /usr/lib/systemd/system/polkit.service

[Unit]
Description=Authorization Manager
Documentation=man:polkit(8)

[Service]
Type=dbus
BusName=org.freedesktop.PolicyKit1
ExecStart=/usr/lib/polkit-1/polkitd

• Restart the service

sudo systemctl daemon-reload
sudo systemctl restart polkit