During your sync operation, you receive an error which says ‘Cannot Create Empty Shipment’ in the target application, which is Magento 2.

Cause:

There might be a number of reasons for this error:
a. Source Input packet error or invalid.
b. Transformation needs to be changed.

Resolution:

To resolve this issue, follow the links below for reference.

Apply Condition in mapping or transformation

Check here to resolve this issue from code level

How to create a Shipment in Magento 2