Thanks for testing, but somethnig must have gotten wrong when you installed those packages, so that you ended up with openvpn (release 197.1) from the devel project, but openvpn-auth-pam-plugin is still from Tumbleweed (release 1.1). Please repeat the test with openvpn-auth-pam-plugin also coming from the devel package: https://download.opensuse.org/repositories/network:/vpn/openSUSE_Tumbleweed/x86_64/openvpn-auth-pam-plugin-2.5.4-197.1.x86_64.rpm