[strongSwan] getting internal address failure for IP6tunnelinIPV4

[Dees]

I am trying to establish IPV6 tunnel in IPV4 with internal IPV6 address for client, it is failing with no virtual ip found, any guidance why would that be?
Apr 26 11:43:58 segw1 charon: 17[ENC] added payload of type AUTHENTICATION to messageApr 26 11:43:58 segw1 charon: 17[IKE] authentication of 'test.local' (myself) with RSA signature successfulApr 26 11:43:58 segw1 charon: 17[IKE] IKE_SA certs-only-sn1[1] established between 173.38.2.2[xxx.xxx.xxxx.local]...173.38.2.1[002448FFFF0CA590.node.com]Apr 26 11:43:58 segw1 charon: 17[IKE] IKE_SA certs-only-sn1[1] state change: CONNECTING => ESTABLISHEDApr 26 11:43:58 segw1 charon: 17[IKE] sending end entity cert "CN=x, O=x"Apr 26 11:43:58 segw1 charon: 01[JOB] next event in 29s 861ms, waitingApr 26 11:43:58 segw1 charon: 17[ENC] added payload of type CERTIFICATE to messageApr 26 11:43:58 segw1 charon: 17[IKE] peer requested virtual IP %anyApr 26 11:43:58 segw1 charon: 17[IKE] no virtual IP found for %any requested by '002448FFFF0CA590.node.com'Apr 26 11:43:58 segw1 charon: 17[IKE] no virtual IP found, sending INTERNAL_ADDRESS_FAILUREApr 26 11:43:58 segw1 charon: 17[ENC] added payload of type NOTIFY to message

conn certs-only-sn        left=test.local        leftcert=test.pem        leftid=@testlocal        leftsubnet=fd00:0:0:10::/64        ike=aes-sha1-modp2048!        esp=aes-sha1-modp2048!        mobike=no        rightauth=rsasig        leftauth=rsasig        rightid=002448FFFF0CA590.node.com        rightsourceip=fd00:0:0:11::1        auto=add
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