You can check if your IPv6 address works by going to this website.
If the page loads and you see something like 2a02:1610:1002:1000::1005, IPv6 is working properly for you and you don’t need to do anything. If not, read on!
Run Tunnelblick, and click the tunnel icon and choose VPN settings.
Make sure that you’ve chosen OVPN - Sverige as your configuration file in the left-hand column. There is no need to check the log that will appear. Instead, just click Settings in the right-hand column.
Change OpenVPN version to 2.3.4.
Now connect to OVPN again, and check if you can visit this website. If you can load the page, it works!