you seem to have configured an HTTP proxy server on 10.3.0.160:8080 ; openvpn tries to use this proxy server and will then issue the command
CONNECT 178.32.108.245:443 HTTP/1.0
to connect to the openvpn server itself; your proxy server reports a 404 error on this - check your proxy server logs (or disable the 'http-proxy' line in the openvpn config file.