Describe the bug
When trying to switch on autoconnect via the GUI, a popup appears saying "Unable to setup autoconnect!". The debug log shows the following:

2020-10-31 12:10:40,957 — linux-gui — DEBUG — update_autoconnect_combobox_changed:264 — >>> Starting "update_autoconnect_combobox_changed" thread.
2020-10-31 12:10:40,957 — linux-gui — DEBUG — update_connect_preference:102 — >>> Running "update_connect_preference".
2020-10-31 12:10:40,968 — linux-gui — DEBUG — daemon_exists:334 — CompletedProcess(args=['systemctl', 'status', 'custompvpn-autoconnect'], returncode=4, stdout=b'', stderr=b'Unit custompvpn-autoconnect.service could not be found.\n')
2020-10-31 12:10:40,974 — linux-gui — DEBUG — enable_autoconnect:268 — errs: usage: sudo -h | -k | -k | -v
usage: sudo -v [-akns] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-akns] [-g group] [-h host] [-p prompt] [-u user] [-u user]
[command]
usage: sudo [-abehknps] [-r role] [-t type] [-c num] [-g group] [-h host] [-p
prompt] [-t timeout] [-u user] [var=value] [-i|-s] []
usage: sudo -e [-akns] [-r role] [-t type] [-c num] [-g group] [-h host] [-p
prompt] [-t timeout] [-u user] file ...

outs:
2020-10-31 12:10:40,974 — linux-gui — DEBUG — update_connect_preference:118 — >>> Result: False <-> Unable to setup autoconnect!
2020-10-31 12:10:40,974 — linux-gui — DEBUG — update_connect_preference:122 — >>> Ended tasks in "update_autoconnect" thread.

To Reproduce
Steps to reproduce:

1. Launch GUI
2. Go to settings
3. Toggle autoconnect to on
4. Dialog will pop up saying "Unable to setup autoconnect!"

Expected behavior
Autoconnect should toggle on, and the systemd service should be created for this.

Device Info

• Device: Laptop
• OS: Pop_OS! 20.04 LTS
• ProtonVPN GUI Version: 2.1.1 (with NOPASSWD set in the sudoers file)

WORKAROUND
The debug log points to the code calling the sudo command with wrong arguments on my OS (Pop_OS! 20.04). If I manually create the custompvpn-autoconnect.service file with the supplied contents from the source, ProtonVPN will automatically connect as per the expected behaviour.