Scope with specified activity Id Resolve_Event_SubProcess and execution 9e3d1686-1edd-11e9-b490-507b9dc4ed46 not found

I was using camunda Rest api to start process instance with process variables.

Exception:
ENGINE-16004 Exception while closing command context: Unknown property used in expression: ${taskResolveDate}. Cause: Cannot resolve identifier 'taskResolveDate'

workflownew.bpmn (9.4 KB)

ProcessVariable:

{
  "variables": {
    "taskResolveDate" : {
        "value" : "2019-01-24T00:00:000Z",
        "type": "String"
    }
  }
}