ProtonVPN CLI - Kill Switch / rfkill (boot.log)

sudo more /var/log/boot.log
/dev/sda1: clean, 289459/13434880 files, 3463482/53710592 blocks
....
[  OK  ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
...
         Starting Load/Save RF Kill Switch Status...
[  OK  ] Started Load/Save RF Kill Switch Status.
[  OK  ] Started Helper to synchronize boot up for ifupdown.
...
[  OK  ] Started Authorization Manager.
[  OK  ] Started Network Manager.
         Starting Network Manager Wait Online...
         Starting Hostname Service...
[  OK  ] Started Hostname Service.
[  OK  ] Started Modem Manager.
[  OK  ] Started Accounts Service.
         Starting Manage, Install and Generate Color Profiles...
         Starting Network Manager Script Dispatcher Service...
[  OK  ] Started Network Manager Script Dispatcher Service.
[FAILED] Failed to start Raise network interfaces.
See 'systemctl status networking.service' for details.
[  OK  ] Reached target Network.
         Starting Permit User Sessions...
         Starting OpenVPN service...
         Starting Bandwidth shaper/Network rate limiter...
         Starting MiniDLNA lightweight DLNA/UPnP-AV server...
[  OK  ] Started Permit User Sessions.
[  OK  ] Started OpenVPN service.