ipsec ike v1 with certificate

Hello,

I have a problem configuring ipsec vpn with ikev1 and certificate. Upon receiving ike certificate request, i see in the ipsec logs →

ipsec:IKEv1 supports only RSA keys at the moment.

ipsec: failed to sign.

ipsec: x.x.x.x failed to process packet.

Any help appreciated..