When you found error Synchronization Business Partner during create business partner via BP transaction code and this error was sent to your SBWP Inbox.
This error comes from your FSCM ( Financial Supply Chain Management ) configuration, and you need to fixing your FSCM configuration first, but if you just need to create BP before FSCM configuration fixing with FI consultant. I have temporary solution for you.
Here the step, You need to deactivate Synchronization Process via SPRO -> Cross Application Component.
You need to unchecked PPO Activate from BP Syn Object.
Dont forget to save your changing. now you can create BP without error Syncronization Process.