There must be two default input ports in the Unstructured Data transformation.
The Unstructured Data transformation is configured for file output. When the output type is file, the Unstructured Data transformation receives the source file in the InputBufferPort and the output file name in the OutputFileName port. One of the default input ports is missing or one of the ports is a duplicate.
The Designer creates the default input ports. You cannot delete or add them. You can change the output type to update the default ports or recreate the transformation.