[strongSwan] V5 RC "no XAuth method found" error

[Igor]

Trying to use cool V5 Strongswan to replace V4.3, but it breaks
working Apple iOS VPN server config.
Complaint error like: Jun 24 09:34:41 13[CFG] no XAuth method found,
what's wrong with my config?

Thanks.

ipsec.secrets

<serverIP> %any : PSK xxx
test : XAUTH "test"

ipsec.conf

conn apple
        type=tunnel
        auto=start
        installpolicy=yes
        authby=xauthpsk
        xauth=server
        modeconfig=push
        left=%defaultroute
        leftsubnet=0.0.0.0/0
        right=%any


Bests,
-Igor