Just to provide further information regarding my case, here is my config file
client
dev tun
proto tcp
remote 127.0.0.1 1900
http-proxy ro.ovadd.com 7080
persist-key
persist-tun
resolv-retry infinite
route-metric 1
nobind
pull
verb 3
auth-user-pass
<ca>
-----BEGIN CERTIFICATE-----
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BQADgYEAvzmT54kZgBtISwrNAKT5IDevnxg0nv1qBSTML8l602LZb0DHr+hUqeXL
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P4myTP3QRXms/qal9RGU0Zd6aV7sfS8kaaF4qV6adO+zFOL+9AE=
-----END CERTIFICATE-----
</ca>
--certs removed, ecrist