On login, or when NetworkManager is restarted, an error message from PolicyKit 1 pops up:

System policy prevents enabling or disabling device statistics
An application is attempting to perform an action that requires privileges. Authentication is required to perform this action.
Password for root: ____
OK | Cancel

Call this Message 1.

On attempting to turn Airplane Mode on/off, two more messages pop up in sequence.

System policy prevents enabling or disabling Wi-Fi devices
An application is attempting to perform an action that requires privileges. Authentication is required to perform this action.
Password for root: ____
OK | Cancel

System policy prevents enabling or disabling mobile broadband devices
An application is attempting to perform an action that requires privileges. Authentication is required to perform this action.
Password for root: ____
OK | Cancel

Call these Messages 2A and 2B.

On attempting to connect to Wi-Fi, another message pops up.

System policy prevents control of network connections
An application is attempting to perform an action that requires privileges. Authentication is required to perform this action.
Password for root: ____
OK | Cancel

Call this Message 3.

Nothing happens (visibly) when message 1 is cancelled. When messages 2A and 2B are cancelled, airplane mode cannot be switched. Message 3 appears after I enter the Wi-Fi password. When message 3 is cancelled, Wi-Fi does not connect, and a notification appears.

Failed to add Network_SSID
Not authorized to control networking.

I have modified 2 files in /etc/polkit-1.

[Network Manager all Users]
Identity=unix-user:*
Action=org.freedesktop.NetworkManager.*
ResultAny=no
ResultActive=yes

polkit.addRule(function(action,subject) {
    if (action.id.indexOf("org.freedesktop.NetworkManager.") == 0 && subject.isInGroup("network")) {
        return polkit.Result.YES;
    }
});

My user is in the “network” group.

After making these modifications, messages 2A and 2B will still appear, but airplane mode will switch if they are cancelled. Messages 1 and 3 still appear.

I am on an Acer laptop, with OpenSUSE Tumbleweed and KDE.

What is the cause of this, and how can I fix it?