SOAP: Business Partner replication error: "Address is incomplete. Please enter country/region"

Dear Community,

We are trying to replicate business partners from C4C to Marketing Cloud using SOAP, and accounts are transferred successfully with address information to the SMC but contacts show an error in the Message Dashboard as you can see below:

As I know the concept of C4C is, that a Contact is always linked to one of the addresses of the account.

It would be great if someone could share any idea.

Appreciate your help!

Thanks,
Onur.