Comment out the LimitNPROC line in /lib/systemd/system/openvpn@.service.
Then run systemctl daemon-reload
Restart the openvpn service
systemctl restart openvpn@server.service
Comment out the LimitNPROC line in /lib/systemd/system/openvpn@.service.
Then run systemctl daemon-reload
Restart the openvpn service
systemctl restart openvpn@server.service