Set the TLS minimum version to 1.2

In the OpenVPN client, you can set the minimum required TLS version. When I set that to 1.2, I get an error when connecting to the Sophos XG because the server does not support it.

Only when I set the minimal level to 1.0 I get a successful connection.

What do I need to do to set the VPN to use TLS 1.2?