openvpn[25392]: Options error: --key fails with 'client.key': Permission denied (errno=13)

The chmod of the client.key file is `0600`
The qopenvpn application uses sudo via `pkexec`

Sadly it still can't read the key file and I don't want to read it without sudo.

If I use `sudo openvpn client.conf` directly, it can read the key file.