Seeking help for Process deployment

I’m new to camunda and wanted to deploy a few processes that I’ve modelled.
orderprocessing.bpmn (27.8 KB)

This file contains the BPM, I want to know how to assign user tasks to run this bpm

Command ‘CREATE’ rejected with code ‘INVALID_ARGUMENT’: Expected to deploy new resources, but encountered the following errors:
‘orderprocessing.bpmn’: SAXException while parsing input stream [ deploy-error ]

I’m Using Camunda web modeler,